int numLeaves = 400;  //number of leaves to draw
PImage myBackImage;  //define an backgound image
Leaf[] myLeaf = new Leaf[numLeaves];  //define a Leaf object

void setup(){
  myBackImage = loadImage("ground.jpg");  //load it
  size(myBackImage.width,myBackImage.height);  //size screen to the image
  for(int i=0; i<numLeaves; i++){  //for all the number of leaves
    myLeaf[i] = new Leaf();  //create a Leaf object
    myLeaf[i].rate=int(random(2,20));
  }
}

void draw(){
  image(myBackImage, 0,0);  //draw first the backgound
  for(int i=0; i<numLeaves; i++)
    myLeaf[i].draw();  //draw all the leaves

}