BImage image;
void setup() {
//  smooth();
  image = loadImage("balloons.jpg");
  size(image.width, image.height);
  framerate(20);
}
void loop() {
  background(image);
  int count = 8;
  int mx = constrain(mouseX,15,width-15);
  int my = constrain(mouseY,15,height-15);
  for (int i=count; i>=0; i--) {
    int sx = 30+i*5;
    int sy = 30+i*5;
    int dx = 30+((width/2-15)*i/count);
    int dy = 30+((height/2-15)*i/count);
    int ix = width/2*i/count + (mx*(count-i)/count);
    int iy = height/2*i/count + (my*(count-i)/count);
    image(image.get(mx-sx,my-sy,sx*2,sy*2),
          ix-dx, iy-dy,
          dx*2,dy*2);
  }
}