createCanvas(400, 400);

  background(255);

}

​

function draw() {

  background(25);

  noStroke();

  randomSeed(1);

  fill(255, 0, 0);

​

  const SPACE = 20;

  const RAND_MAX = map(mouseX, 0, width, 0, 10);

​

  for (let i = SPACE; i < height; i += SPACE) {

    for (let j = SPACE; j < width; j += SPACE) {

      let rand = random(-RAND_MAX, RAND_MAX);

      // rand = 0;

      circle(j + rand + ((i/SPACE)%2)*(SPACE/2), i + rand, 5);

    }

  }

}

​