PImage myImage;                                // variable to hold the image
int shiftX=150, shiftY=100;                    // these will hold our panning anounts
void setup() {
  size (300, 200);  
  myImage = loadImage("flowers.jpg");            // load image from data folder  
  imageMode(CENTER);        // we want to specify the center of the image, not top left
}

void draw() {                          // icrement our shift variables if we are close to the edges
  if (mouseX> width-10)shiftX--;
  if (mouseX< 10)shiftX++;
  if (mouseY> height-10)shiftY--;
  if (mouseY< 10)shiftY++;
  pushMatrix();                          // setting pushMatrix() so that we can revert to the normal matrix later
  background(255);
  translate(shiftX, shiftY);          // translate the coordinate system by our shift amount
  image (myImage, 0, 0);            // use image to draw on screen
  popMatrix();                      // reverting to the normal matrix in order to draw another image not shifted
  image (myImage, width/2, height/2, 120, 80);
}