let xPos = 400;

let yPos = 300;

​

// if you use preload, setup() will wait for loads to finish before runningfunction

function preload() {

  img = loadImage("Cbridge.jpg");

}

​

function setup() {

  createCanvas(800, 600);

  background(100);

  // display the loaded image at 0, 0

  //image(img, 0, 0);

}

​

function draw() {

  noStroke();

 let ptCol = img.get(xPos/4, yPos/4);

  fill(ptCol);

  ellipse(xPos, yPos, 20);

    let jitter = 10;

  xPos += random(-jitter, jitter);

  yPos += random(-jitter, jitter);

 }