PImage a;  // Declare variable "a" of type PImage
  
  void setup() {
    size(200, 200);
    // The file "jelly.jpg" must be in the data folder
    // of the current sketch to load successfully
    a = loadImage("jelly.jpg");  // Load the image into the program  
    noLoop();  // Makes draw() only run once
  }
  
  void draw() {
    // Displays the image at its actual size at point (0,0)
    image(a, 0, 0); 
    // Displays the image at point (100, 0) at half of its size
    image(a, 100, 0, a.width/2, a.height/2);
  }