​

function setup() {

  createCanvas(windowWidth, windowHeight);

  margin = width / 4;

​

  noStroke();

  fill('#fffff1');

}

​

function draw() {

  background(0);

  translate(width/2.5, height/2.5);

​

  let cols = 5, rows = 5;

  let spacing = height/20;

​

  for (let i = 0; i < cols; i++) {

    for (let j = 0; j < rows; j++) {

      let wave = tan(radians(frameCount + (i+j)*2)) * 30;

      let x = i * spacing + wave;

      let y = j * spacing + wave;

      circle(x, y, width/50);

    }

  }

  // if(frameCount == 1) saveGif('tan', 3)

​

}

​