NXJ Marble Gun

import lejos.nxt.Button;
import lejos.nxt.Motor;

public class first1 {
  public static void main (String[] args) {

        fire();
  }
  public static void fire() //fire marble gun (360 degree rotation on Motor A)
  {
      Button.waitForAnyPress();
      if(Button.ENTER.isDown())     //if enter is pressed, fire
      {
          Motor.A.rotate(360);
      }
      if(!Button.ESCAPE.isDown())   //if escape is pressed, exit program
      {
         fire();
      }
  }
}