​

let backgroundImage;

​

function preload() {

  // load in the shader

  exampleShader = loadShader('example.vert', 'example.frag');

  // load in the image

  backgroundImage = loadImage('dog.jpeg');

}

​

function setup(){ 

  createCanvas(600, 600, WEBGL);

  shader(exampleShader);

  exampleShader.setUniform("background", backgroundImage);

}

​

function draw() {

  exampleShader.setUniform("millis", millis());

  // Run shader

  rect(-width/2, -height/2, width);

}