// future: add buttons

​

let r, g, b, c;

​

function setup() {

  createCanvas(windowWidth,windowHeight);

  background(0);

}

​

function draw() {

  let t;

  if (width<height) {

    t = width

  }

  else {

    t = height;

  }

  strokeWeight(0.01);

  stroke(255)

  // color

  r = map(mouseX,0,width,0,255,true);

  g = map(mouseY,0,height,0,255,true);

  b = Math.abs(r-g);

  c = color(r,b,g)

  c.setAlpha(3)

  fill(c)

  circle(width/2,height/2,(0.5*t),(0.5*t))

}

​

function windowResized() {

  resizeCanvas(windowWidth,windowHeight)

}