import acm.program.*; import acm.graphics.*; public class Gui extends GraphicsProgram { /** Width and height of application window in pixels */ public static final int APPLICATION_WIDTH = 1000; public static final int APPLICATION_HEIGHT = 1000; private static final int OBSTACLE_WIDTH = 100; private GOval balls; private GLine obstacle1, obstacle2; public void run(){ setUpObstacle(); } private void setUpObstacle(){ obstacle1 = new GLine(200, 750, 300, 550); obstacle2 = new GLine(300, 650, 400, 450); add(obstacle1); add(obstacle2); } }