createCanvas(300, 300);

}

​

function draw() {

  background(100);

​

  for (let circleY = 75; circleY <= 225; circleY += 75) {

    for (let circleX = 75; circleX <= 225; circleX += 75) {

      circle(circleX, circleY, 50);

    }

  }

}