Lick it and stick it

Return to Unity. You should still see your DisappearMe script in the Project panel. In order to attach it to the ball, drag-and-drop the file over the Ball Game Object in the Hierarchy panel. If drag-and-drop isn't your thing, you can also select the Ball Game Object, and choose Component | Scripts | Disappear Me from the menu. Once you do this, it may not look as if anything happened. To confirm that you did it correctly, click on the Ball. At the bottom of the Inspector panel where components of the Ball are listed, you should see your DisappearMe script.