// Daniel Shiffman, edited by Kate Bauer
// The Nature of Code
// ITP, Spring 2006
// http://www.shiffman.net/

// A random walker object!

class Ivy2 {
  int x,y;

  Ivy2() {
    x = width/3;
    y = height/2;
  }

  void render() {
    stroke (79,122,18);
    point(x,y);
  }

  // Randomly move up, down, left, right, or stay in one place
  void grow() {
    int vx = int(random(3))-1;
    int vy = int(random(3))-1;
    x += vx;
    y += vy;
    x = constrain(x,0,width);
    y = constrain(y,0,height);
  }
}