let circleX;

let circleY;

​

function setup() {

  createCanvas(500, 500);

}

​

function draw() {

  background(220);

  for (let j = 1; j <= 10; j += 1) {

    circleY = j * spaceBetween;

​

    for (let i = 1; i <= 10; i += 1) {

      circleX = i * spaceBetween;

      circle(circleX, circleY, 20);

    }

  }

​

  noLoop();

}

​