let img;

​

function preload() {

  img = loadImage('https://picsum.photos/20/20'); // Load the image

}

​

function setup() {

  createCanvas(400, 400);

  pg = createGraphics(400, 400);

  drawPG();

}

​

function draw() {  

  image(pg, 0, 0);

  ellipse(mouseX, mouseY, 40, 40);

}

​

function drawPG() {

  for (let i = 0; i < 20; i++) {

    for (let j = 0; j < 20; j++) {

      pg.image(img, i*20, j*20);

    }

  }

}