createCanvas(windowWidth, windowHeight);

}

​

function draw(){

  background(255);

  let size = height/2;

  strokeJoin(ROUND);

  strokeWeight(size * 0.015);

  stroke(0);

  noFill();

  let time = millis() / 1000;

  let duration = 7;

  let playhead = time / duration % 1;

  let rotation = playhead * PI * 2;

  let x = width / 2;

  let y = height / 2;

  push();

  translate(x, y);

  rotate(rotation);

  rectMode(CENTER);

  rect(0, 0, size, size);

​

  pop();

}

​

function windowResized () {

  resizeCanvas(windowWidth, windowHeight);

}

​