Simon Game.js

let gameSeq=[];
let userSeq=[];

let btns=["yellow", "red", "purple", "green"];

let started=false;
let level=0;

let h2=document.querySelector("h2");

document.addEventListener("keypress", function(){
    if(started==false){
        console.log("Game is started");
        started=true;

        levelUp();
    }
});

function gameFlash(btn){
    btn.classList.add("flash");
    setTimeout(function(){
        btn.classList.remove("flash");
    },250 );
}

function userFlash(btn){
    btn.classList.add("userflash");
    setTimeout(function(){
        btn.classList.remove("userflash");
    },250 );
}

function levelUp(){
    userSeq=[]; 

    level++;
    h2.innerText=`Level ${level}`;

    //random btn choose
    let randIdx=Math.floor(Math.random()*3);
    let randColor=btns[randIdx];
    let randBtn=document.querySelector(`.${randColor}`);
   /* console.log(randIdx);
    console.log(randColor);
    console.log(randBtn);*/
    gameSeq.push(randColor);
    console.log(gameSeq);
    gameFlash(randBtn);
}

function checkAns(idx){
    //console.log("Current level:",level);

    if(userSeq[idx]==gameSeq[idx]){
        if(userSeq.length==gameSeq.length){
            setTimeout(levelUp,1000);
        }
    }
    else{
        h2.innerHTML=`Game Over! Your Score was <b>${level}</b> <br> Press any key to start `;
        document.querySelector("body").style.backgroundColor="red";
        setTimeout(function(){ 
            document.querySelector("body").style.backgroundColor="white";
        },150);
        //highScore();
        reset();
    }
}


function btnPress(){
    let btn=this;
    userFlash(btn);

    userColor=btn.getAttribute("id");
    userSeq.push(userColor);

    checkAns(userSeq.length-1);
}

let allBtns=document.querySelectorAll(".btn");
for(btn of allBtns){
    btn.addEventListener("click",btnPress)
}


/*function highScore(){
    let highest=0;
    if(level>highest){
        highest=level;
        console.log(`high Score ${highest}`);
    }
}*/

function reset(){
    started=false;
    level=0;
    gameSeq=[];
    userSeq=[];
}