// a class for bullet of player
class Bullet {
  PVector pos, vel; //PVector to store position and velocity valuse
  int radius = 2; // constant radius of bullet factor
  Bullet (PVector pos, PVector vel) {
    this.pos = pos;
    this.vel = vel;
  }
  boolean collision(Moving other) {
    if ( dist(pos.x, pos.y, other.pos.x, other.pos.y) < 
      radius + other.radius) {
       hit.play(0);
      return true; //collision
    }
    return false; //no collision
  }
 //update the physics for the character
  void update() {
    pos.add(vel); // add velocity to position
    image(bulletimg, pos.x, pos.y, 20, 10);
        //effects of hit
    fill(255, 0, 128);
    ellipse(pos.x, pos.y, radius * 2, radius * 2);
  }
}