java.lang.NullPointerException
        at SceneObjects.Ground.update(Ground.java:153)
        at SceneSystem.Scene.update(Scene.java:68)
        at MineDown.Main.update(Main.java:63)
        at org.newdawn.slick.GameContainer.updateAndRender(GameContainer.java:66
3)
        at org.newdawn.slick.AppGameContainer.gameLoop(AppGameContainer.java:411
)
        at org.newdawn.slick.AppGameContainer.start(AppGameContainer.java:321)
        at MineDown.Main.main(Main.java:84)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
        at java.lang.reflect.Method.invoke(Unknown Source)
        at org.eclipse.jdt.internal.jarinjarloader.JarRsrcLoader.main(JarRsrcLoa
der.java:58)
Mon Apr 28 17:08:15 CDT 2014 ERROR:Game.update() failure - check the game code.
org.newdawn.slick.SlickException: Game.update() failure - check the game code.
        at org.newdawn.slick.GameContainer.updateAndRender(GameContainer.java:66
9)
        at org.newdawn.slick.AppGameContainer.gameLoop(AppGameContainer.java:411
)
        at org.newdawn.slick.AppGameContainer.start(AppGameContainer.java:321)
        at MineDown.Main.main(Main.java:84)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
        at java.lang.reflect.Method.invoke(Unknown Source)
        at org.eclipse.jdt.internal.jarinjarloader.JarRsrcLoader.main(JarRsrcLoa
der.java:58)