​

function preload() {

  // Load the image asset

  pola = loadImage('pola.jpg');

}

​

function setup() {

  createCanvas(300, 300);

}

​

function draw() {

  background(pola);

  // Draw Circle 1

  fill(0, 255, 0);

  circle(100, 200, 80);

  // Draw Circle 2

  fill(0, 0, 255);

  circle(200, 200, 80);

  // Circle 3, dynamically placed

  fill(255, 0, 0, 125); // Alpha channel sets transparency

  circle(mouseX, mouseY, 80);

}