/* built with Studio Sketchpad: 
 *   https://sketchpad.cc
 * 
 * observe the evolution of this sketch: 
 *   https://fgcs.sketchpad.cc/sp/pad/view/ro.3YO1k0bJ8oT/rev.401
 * 
 * authors: 
 *   Markus Roberts

 * license (unless otherwise specified): 
 *   creative commons attribution-share alike 3.0 license.
 *   https://creativecommons.org/licenses/by-sa/3.0/ 
 */ 



// Pressing Control-R will render this sketch.

PImage kitten_picture; 
int top,bottom,left,right;

void setup() {
  size(500, 500); 
  frameRate(30);
  kitten_picture = loadImage("http://freshpet.com/wp-content/uploads/2015/04/kitten-1024x640.jpg"); 
  // start with the image zoomed to 2x the window size & centered
  left   = -0.5*width;
  top    = -0.5*top;
  bottom =  1.5*height;
  right  =  1.5*width;
} 

void draw() {  
  background(64,150,64); // green
  image(kitten_picture,left,top,right,bottom);
  // randomly move the edges of the picture
  left   += random(-5,5);
  top    += random(-5,5);
  bottom += random(-5,5);
  right  += random(-5,5);
}