// Evolution EcoSystem
// Daniel Shiffman <http://www.shiffman.net>
// The Nature of Code

// A World of creatures that eat food
// The more they eat, the longer they survive
// The longer they survive, the more likely they are to reproduce
// The bigger they are, the easier it is to land on food
// The bigger they are, the slower they are to find food
// When the creatures die, food is left behind


World world;

void setup() {
  size(600,400);
  // World starts with 20 creatures
  // and 20 pieces of food
  world = new World(20);
  smooth();
}

void draw() {
  background(56,37,19);
  world.run();
}

// We can add a creature manually if we so desire
void mousePressed() {
  world.born(mouseX,mouseY); 
}