class BewegeLinieY extends Linie {
  
 float speed, _speed;
 
 BewegeLinieY(float xpos, float ypos, float breite, float hoehe, float _speed) {
   super(xpos,ypos,breite,hoehe); 
   speed = _speed;
 }
  
 void update() {
   if(ypos <= 0 + hoehe || ypos >= height - hoehe) {
     speed = (speed * -1);
   }
   ypos += speed;
 } 
}

class BewegeLinieX extends Linie {
  
  float speed, _speed;
 
 BewegeLinieX(float xpos, float ypos, float breite, float hoehe, float _speed) {
   super(xpos,ypos,breite,hoehe); 
   speed = _speed;
 }
  
 void update() {
   float generate = 1;
   if(xpos <= 0 + breite || xpos >= width - breite) {
     speed = (speed * -1);
   }
   xpos += speed;
 } 
}