​

function setup() {

  createCanvas(400, 400);

  background (0)

  circlePos=0

}

function mousePressed (){

  circlePos=0

}

function draw() {

  fill(180,40,mouseY)

  stroke(mouseX, circlePos,40 ,40)

       ellipse(circlePos,mouseY,200);

circlePos=circlePos+1

}