class Goal{
  float x,y;
  //--------------
  Goal(float x, float y){
    this.x = x;
    this.y = y;
  }
  //--------------
  void update(){
    if(max( abs(ball.x-x), abs(ball.y-y) ) < 10 )
      respawn();
  }
  //--------------
  void respawn(){
    x = random(10,width-10);
    y = random(10,width-10);
  }
  //--------------
  void visualize(){
    stroke(255);
    strokeWeight(1);
    fill(128,128,255);
    rect(x-10,y-10,20,20);
  }
}