Any ideas?

I have created two objects, i draw one in the screen and what i want to do is press a button that will make the first object disappear and the second one take the first object’s place.
Any ideas how i can do it?
(Think of it as a book you want to open by pressing a button, first i draw a closed book and then one that looks opened to replace the first one )
Thank you in advance!

Try www.gamedev.net