createCanvas(400, 400);

}

​

function draw() {

  background(50);

​

  noStroke();

  fill(255);

  let gridSize = 50;

  for (let y = 0; y <= height; y += gridSize) {

    for (let x = 0; x <= width; x += gridSize) {

      drawSpinningEllipse(x, y, gridSize, 0.01);

    }

  }

}

​

function drawSpinningEllipse(x, y, len, spd) {

  push();

  translate(x, y);

  rotate(frameCount * spd); // speed of rotation

  ellipse(0, 0, len, len * 0.2); // w:length, h:20% of length

  pop();

}

​