function setup() {

    createCanvas(windowWidth, windowHeight);

    background(0);

}

​

function draw() {

    // ellipse(mouseX, mouseY, 20, 20);

    translate(width/2,height/2)

    rotate(frameCount/100)

    for(var i=0;i<100;i++){

        fill(colors[i%colors.length])

        rect(0,0,width/2-mouseY,10)

        rotate(PI/50+mouseX)

    }

}