diff --git a/README.md b/README.md
index 435917f..484cba6 100644
--- a/README.md
+++ b/README.md
@@ -4,7 +4,7 @@
 Black Mirror
 
 ## Version
-v0.3.10
+v0.4.0
 
 ## Badges
 
diff --git a/docs/index.html b/docs/index.html
index 4d97470..4aea684 100644
--- a/docs/index.html
+++ b/docs/index.html
@@ -1,5 +1,5 @@
-<!doctype html><html lang="en"><head><meta charset="utf-8"><title>Flavor-scss - v0.3.10</title><link rel="stylesheet" href="assets/css/main.css"><link href="https://fonts.googleapis.com/css?family=Open+Sans:400,500,700" rel="stylesheet" type="text/css"><meta name="viewport" content="width=device-width"><meta content="IE=edge, chrome=1" http-equiv="X-UA-Compatible"><!-- Open Graph tags --><meta property="og:title" content="Flavor-scss - SassDoc"><meta property="og:type" content="website"><meta property="og:description" content="<p>Flavor SCSS, bourbon.io based mixins &amp; helpers</p>
-"><!-- Thanks to Sass-lang.com for the icons --><link href="assets/images/favicon.png" rel="shortcut icon"></head><body><aside class="sidebar" role="nav"><div class="sidebar__header"><h1 class="sidebar__title"><a href="https://blackmirror1980.github.io/flavor-scss">Flavor-scss - v0.3.10</a></h1></div><div class="sidebar__body"><button type="button" class="btn-toggle js-btn-toggle" data-alt="Open all">Close all</button><p class="sidebar__item sidebar__item--heading" data-slug="mixins"><a href="#mixins">mixins</a></p><div><p class="sidebar__item sidebar__item--sub-heading" data-slug="mixins-function"><a href="#mixins-function">functions</a></p><ul class="list-unstyled"><li class="sidebar__item sassdoc__item" data-group="mixins" data-name="is-animation-name" data-type="function"><a href="#mixins-function-is-animation-name">is-animation-name</a></li></ul></div><p class="sidebar__item sidebar__item--heading" data-slug="undefined"><a href="#undefined">General</a></p><div><p class="sidebar__item sidebar__item--sub-heading" data-slug="undefined-function"><a href="#undefined-function">functions</a></p><ul class="list-unstyled"><li class="sidebar__item sassdoc__item" data-group="undefined" data-name="is-transition-time" data-type="function"><a href="#undefined-function-is-transition-time">is-transition-time</a></li><li class="sidebar__item sassdoc__item" data-group="undefined" data-name="is-css-default" data-type="function"><a href="#undefined-function-is-css-default">is-css-default</a></li><li class="sidebar__item sassdoc__item" data-group="undefined" data-name="is-length" data-type="function"><a href="#undefined-function-is-length">is-length</a></li><li class="sidebar__item sassdoc__item" data-group="undefined" data-name="is-size" data-type="function"><a href="#undefined-function-is-size">is-size</a></li><li class="sidebar__item sassdoc__item" data-group="undefined" data-name="strip-unit" data-type="function"><a href="#undefined-function-strip-unit">strip-unit</a></li></ul><p class="sidebar__item sidebar__item--sub-heading" data-slug="undefined-mixin"><a href="#undefined-mixin">mixins</a></p><ul class="list-unstyled"><li class="sidebar__item sassdoc__item" data-group="undefined" data-name="transition-delay" data-type="mixin"><a href="#undefined-mixin-transition-delay">transition-delay</a></li><li class="sidebar__item sassdoc__item" data-group="undefined" data-name="transition-duration" data-type="mixin"><a href="#undefined-mixin-transition-duration">transition-duration</a></li><li class="sidebar__item sassdoc__item" data-group="undefined" data-name="prefixer" data-type="mixin"><a href="#undefined-mixin-prefixer">prefixer</a></li></ul><p class="sidebar__item sidebar__item--sub-heading" data-slug="undefined-variable"><a href="#undefined-variable">variables</a></p><ul class="list-unstyled"><li class="sidebar__item sassdoc__item" data-group="undefined" data-name="transitionable-properties" data-type="variable"><a href="#undefined-variable-transitionable-properties">transitionable-properties</a></li><li class="sidebar__item sassdoc__item" data-group="undefined" data-name="transition-timing-functions-names" data-type="variable"><a href="#undefined-variable-transition-timing-functions-names">transition-timing-functions-names</a></li></ul></div></div></aside><article class="main" role="main"><header class="header" role="banner"><div class="container"><div class="sassdoc__searchbar searchbar"><label for="js-search-input" class="visually-hidden">Search</label><div class="searchbar__form" id="js-search"><input name="search" type="search" class="searchbar__field" autocomplete="off" autofocus id="js-search-input" placeholder="Search"><ul class="searchbar__suggestions" id="js-search-suggestions"></ul></div></div></div></header><section class="main__section"><h1 class="main__heading" id="mixins"><div class="container">mixins</div></h1><section class="main__sub-section" id="mixins-function"><h2 class="main__heading--secondary"><div class="container">functions</div></h2><section class="main__item container item" id="mixins-function-is-animation-name"><h3 class="item__heading"><a class="item__name" href="#function-is-animation-name">is-animation-name</a></h3><div class="item__code-wrapper"><pre class="item__code item__code--togglable language-scss" data-current-state="collapsed" data-expanded="@function is-animation-name() { 
+<!doctype html><html lang="en"><head><meta charset="utf-8"><title>Flavor-scss - v0.4.0</title><link rel="stylesheet" href="assets/css/main.css"><link href="https://fonts.googleapis.com/css?family=Open+Sans:400,500,700" rel="stylesheet" type="text/css"><meta name="viewport" content="width=device-width"><meta content="IE=edge, chrome=1" http-equiv="X-UA-Compatible"><!-- Open Graph tags --><meta property="og:title" content="Flavor-scss - SassDoc"><meta property="og:type" content="website"><meta property="og:description" content="<p>Flavor SCSS, bourbon.io based mixins &amp; helpers</p>
+"><!-- Thanks to Sass-lang.com for the icons --><link href="assets/images/favicon.png" rel="shortcut icon"></head><body><aside class="sidebar" role="nav"><div class="sidebar__header"><h1 class="sidebar__title"><a href="https://blackmirror1980.github.io/flavor-scss">Flavor-scss - v0.4.0</a></h1></div><div class="sidebar__body"><button type="button" class="btn-toggle js-btn-toggle" data-alt="Open all">Close all</button><p class="sidebar__item sidebar__item--heading" data-slug="mixins"><a href="#mixins">mixins</a></p><div><p class="sidebar__item sidebar__item--sub-heading" data-slug="mixins-function"><a href="#mixins-function">functions</a></p><ul class="list-unstyled"><li class="sidebar__item sassdoc__item" data-group="mixins" data-name="is-animation-name" data-type="function"><a href="#mixins-function-is-animation-name">is-animation-name</a></li></ul></div><p class="sidebar__item sidebar__item--heading" data-slug="undefined"><a href="#undefined">General</a></p><div><p class="sidebar__item sidebar__item--sub-heading" data-slug="undefined-function"><a href="#undefined-function">functions</a></p><ul class="list-unstyled"><li class="sidebar__item sassdoc__item" data-group="undefined" data-name="is-transition-time" data-type="function"><a href="#undefined-function-is-transition-time">is-transition-time</a></li><li class="sidebar__item sassdoc__item" data-group="undefined" data-name="is-css-default" data-type="function"><a href="#undefined-function-is-css-default">is-css-default</a></li><li class="sidebar__item sassdoc__item" data-group="undefined" data-name="is-length" data-type="function"><a href="#undefined-function-is-length">is-length</a></li><li class="sidebar__item sassdoc__item" data-group="undefined" data-name="is-size" data-type="function"><a href="#undefined-function-is-size">is-size</a></li><li class="sidebar__item sassdoc__item" data-group="undefined" data-name="strip-unit" data-type="function"><a href="#undefined-function-strip-unit">strip-unit</a></li></ul><p class="sidebar__item sidebar__item--sub-heading" data-slug="undefined-mixin"><a href="#undefined-mixin">mixins</a></p><ul class="list-unstyled"><li class="sidebar__item sassdoc__item" data-group="undefined" data-name="transition-delay" data-type="mixin"><a href="#undefined-mixin-transition-delay">transition-delay</a></li><li class="sidebar__item sassdoc__item" data-group="undefined" data-name="transition-duration" data-type="mixin"><a href="#undefined-mixin-transition-duration">transition-duration</a></li><li class="sidebar__item sassdoc__item" data-group="undefined" data-name="prefixer" data-type="mixin"><a href="#undefined-mixin-prefixer">prefixer</a></li></ul><p class="sidebar__item sidebar__item--sub-heading" data-slug="undefined-variable"><a href="#undefined-variable">variables</a></p><ul class="list-unstyled"><li class="sidebar__item sassdoc__item" data-group="undefined" data-name="transitionable-properties" data-type="variable"><a href="#undefined-variable-transitionable-properties">transitionable-properties</a></li><li class="sidebar__item sassdoc__item" data-group="undefined" data-name="transition-timing-functions-names" data-type="variable"><a href="#undefined-variable-transition-timing-functions-names">transition-timing-functions-names</a></li></ul></div></div></aside><article class="main" role="main"><header class="header" role="banner"><div class="container"><div class="sassdoc__searchbar searchbar"><label for="js-search-input" class="visually-hidden">Search</label><div class="searchbar__form" id="js-search"><input name="search" type="search" class="searchbar__field" autocomplete="off" autofocus id="js-search-input" placeholder="Search"><ul class="searchbar__suggestions" id="js-search-suggestions"></ul></div></div></div></header><section class="main__section"><h1 class="main__heading" id="mixins"><div class="container">mixins</div></h1><section class="main__sub-section" id="mixins-function"><h2 class="main__heading--secondary"><div class="container">functions</div></h2><section class="main__item container item" id="mixins-function-is-animation-name"><h3 class="item__heading"><a class="item__name" href="#function-is-animation-name">is-animation-name</a></h3><div class="item__code-wrapper"><pre class="item__code item__code--togglable language-scss" data-current-state="collapsed" data-expanded="@function is-animation-name() { 
   @return is-string($an) or array-contains($animation-name-modes, $an);
  }" data-collapsed="@function is-animation-name() { ... }"><code>@function is-animation-name() { ... }</code></pre></div><h3 class="item__sub-heading">Description</h3><div class="item__description"><p>Checks if animation name is string or css default (inherit, initial)</p></div><h3 class="item__sub-heading">Parameters</h3><p>None.</p><h3 class="item__sub-heading">Returns</h3><div class="item__description item__description--inline"><code>Bool</code></div><h3 class="item__sub-heading">Author</h3><ul class="list-unstyled"><li><p>Black mirror</p></li></ul></section></section></section><section class="main__section"><h1 class="main__heading" id="undefined"><div class="container">General</div></h1><section class="main__sub-section" id="undefined-function"><h2 class="main__heading--secondary"><div class="container">functions</div></h2><section class="main__item container item" id="undefined-function-is-transition-time"><h3 class="item__heading"><a class="item__name" href="#function-is-transition-time">is-transition-time</a></h3><div class="item__code-wrapper"><pre class="item__code item__code--togglable language-scss" data-current-state="collapsed" data-expanded="@function is-transition-time() { 
   @return is-defined($td) and (is-time($td) or is-css-default($td));
@@ -55,4 +55,4 @@
   -webkit-border-radius: 10px;
   -moz-border-radius: 10px;
   border-radius: 10px;
-}</code></pre></div><h3 class="item__sub-heading">Used by</h3><ul class="list-unstyled"><li><span class="item__cross-type">[mixin]</span> <a href="#undefined-mixin-transition-delay"><code>transition-delay</code></a></li><li><span class="item__cross-type">[mixin]</span> <a href="#undefined-mixin-transition-duration"><code>transition-duration</code></a></li></ul></section></section><section class="main__sub-section" id="undefined-variable"><h2 class="main__heading--secondary"><div class="container">variables</div></h2><section class="main__item container item" id="undefined-variable-transitionable-properties"><h3 class="item__heading"><a class="item__name" href="#variable-transitionable-properties">transitionable-properties</a></h3><div class="item__code-wrapper"><pre class="item__code language-scss"><code>$transitionable-properties: (background, background-color, background-position, background-size, border, border-bottom, border-bottom-color, border-bottom-left-radius, border-bottom-right-radius, border-bottom-width, border-color, border-left, border-left-color, border-left-width, border-right, border-right-color, border-right-width, border-spacing, border-top, border-top-color, border-top-left-radius, border-top-right-radius, border-top-width, bottom, box-shadow, clip, color, column-count, column-gap, column-rule, column-rule-color, column-rule-width, column-width, columns, filter, flex, flex-basis, flex-grow, flex-shrink, font, font-size, font-size-adjust font-stretch font-weight, height, left, letter-spacing, line-height, margin, margin-bottom, margin-left, margin-right, margin-top, max-height, max-width, min-height, min-width, opacity, order, outline, outline-color, outline-offset, outline-width, padding, padding-bottom, padding-left, padding-right, padding-top, perspective, perspective-origin, right, text-decoration-color, text-indent, text-shadow, top, transform, transform-origin, vertical-align, visibility width, word-spacing, z-index);</code></pre></div><h3 class="item__sub-heading">Description</h3><div class="item__description"><p><strong><em>transition property</em></strong></p></div></section><section class="main__item container item" id="undefined-variable-transition-timing-functions-names"><h3 class="item__heading"><a class="item__name" href="#variable-transition-timing-functions-names">transition-timing-functions-names</a></h3><div class="item__code-wrapper"><pre class="item__code language-scss"><code>$transition-timing-functions-names: (steps, cubic-bezier);</code></pre></div><h3 class="item__sub-heading">Description</h3><div class="item__description"><p><strong><em>transition timing</em></strong></p></div></section></section></section><footer class="footer" role="contentinfo"><div class="container"><div class="footer__project-info project-info"><!-- Name and URL --> <a class="project-info__name" href="https://blackmirror1980.github.io/flavor-scss">Flavor-scss</a><!-- Version --> <span class="project-info__version">- v0.3.10</span><!-- License --> <span class="project-info__license">, under MIT</span></div><a class="footer__watermark" href="http://sassdoc.com"><img src="assets/images/logo_light_inline.svg" alt="SassDoc Logo"></a></div></footer></article><script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script><script>window.jQuery || document.write('<script src="assets/js/vendor/jquery.min.js"><\/script>')</script><script src="assets/js/main.min.js"></script></body></html>
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+}</code></pre></div><h3 class="item__sub-heading">Used by</h3><ul class="list-unstyled"><li><span class="item__cross-type">[mixin]</span> <a href="#undefined-mixin-transition-delay"><code>transition-delay</code></a></li><li><span class="item__cross-type">[mixin]</span> <a href="#undefined-mixin-transition-duration"><code>transition-duration</code></a></li></ul></section></section><section class="main__sub-section" id="undefined-variable"><h2 class="main__heading--secondary"><div class="container">variables</div></h2><section class="main__item container item" id="undefined-variable-transitionable-properties"><h3 class="item__heading"><a class="item__name" href="#variable-transitionable-properties">transitionable-properties</a></h3><div class="item__code-wrapper"><pre class="item__code language-scss"><code>$transitionable-properties: (background, background-color, background-position, background-size, border, border-bottom, border-bottom-color, border-bottom-left-radius, border-bottom-right-radius, border-bottom-width, border-color, border-left, border-left-color, border-left-width, border-right, border-right-color, border-right-width, border-spacing, border-top, border-top-color, border-top-left-radius, border-top-right-radius, border-top-width, bottom, box-shadow, clip, color, column-count, column-gap, column-rule, column-rule-color, column-rule-width, column-width, columns, filter, flex, flex-basis, flex-grow, flex-shrink, font, font-size, font-size-adjust font-stretch font-weight, height, left, letter-spacing, line-height, margin, margin-bottom, margin-left, margin-right, margin-top, max-height, max-width, min-height, min-width, opacity, order, outline, outline-color, outline-offset, outline-width, padding, padding-bottom, padding-left, padding-right, padding-top, perspective, perspective-origin, right, text-decoration-color, text-indent, text-shadow, top, transform, transform-origin, vertical-align, visibility width, word-spacing, z-index);</code></pre></div><h3 class="item__sub-heading">Description</h3><div class="item__description"><p><strong><em>transition property</em></strong></p></div></section><section class="main__item container item" id="undefined-variable-transition-timing-functions-names"><h3 class="item__heading"><a class="item__name" href="#variable-transition-timing-functions-names">transition-timing-functions-names</a></h3><div class="item__code-wrapper"><pre class="item__code language-scss"><code>$transition-timing-functions-names: (steps, cubic-bezier);</code></pre></div><h3 class="item__sub-heading">Description</h3><div class="item__description"><p><strong><em>transition timing</em></strong></p></div></section></section></section><footer class="footer" role="contentinfo"><div class="container"><div class="footer__project-info project-info"><!-- Name and URL --> <a class="project-info__name" href="https://blackmirror1980.github.io/flavor-scss">Flavor-scss</a><!-- Version --> <span class="project-info__version">- v0.4.0</span><!-- License --> <span class="project-info__license">, under MIT</span></div><a class="footer__watermark" href="http://sassdoc.com"><img src="assets/images/logo_light_inline.svg" alt="SassDoc Logo"></a></div></footer></article><script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script><script>window.jQuery || document.write('<script src="assets/js/vendor/jquery.min.js"><\/script>')</script><script src="assets/js/main.min.js"></script></body></html>
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