class Laser extends Sprite {
  PImage image;
  Laser(float x, float y) {
    this.x = x;
    this.y = y;
    image = loadImage("fire1.gif");
  }
  void update() {
    y-=5;
    if (y<0) alive = false;
  }
  void draw() {
    image(image,x-image.width/2,y-image.height);
  }
}

class Explosion extends Sprite {
  AnimImage image;
  float frame = 0;
  Explosion(float x, float y) {
    this.x = x;
    this.y = y;
    image = new AnimImage(loadImage("explode1.gif"),32,32);
  }
  void update() {
    frame+=0.7f;
    if ((int)frame>=image.frames)
      alive = false;
  }
  void draw() {
    imageMode(CENTER);
    image.draw(x,y,(int)frame);
    imageMode(CORNER);
  }
}