class Movement extends Thread{
	EnemyShip es;
	public Movement(EnemyShip ref){
		es=ref;
	}

	public void run(){
		while(true){
				if(es.r==1){
					es.setLocation(es.getX()+2,es.getY());
				}
				else{
					es.setLocation(es.getX()-2,es.getY());
				}

				try{
					sleep(es.speed);
				}
				catch(Exception e){
				}
			if(es.getX()<0 || es.getX()>640){
				System.out.println("Reached other side");
				es.setLocation(-150,-150);
				try{
					wait();
				}
				catch(Exception e){
					System.out.println("can't wait");
					}
			}
		}
	}