Un-do setbg/fill bg with pattern

[mwforum@xxxxxxxxxxxxxxxxxx (Clara Jackson)]

Hello! Some of the Gifted and Talented students I work with have come
across 2 problems.....help!
 
1.  How do you "un-do" a "setbg" command once it has been run? I have,
of course, deleted and tried numerous times, but the background remains
the same.

2.  The program has a "sleuth" searching for a hidden treasure.  When
he "finds" it through a "colorunder" command, the program clears the
graphics and the player can start the game again with a new path.  We
only are able to "dump" the grass on the page by using the paint can. 
Of course, that ruins the "randomness" of the program they have
written.
How can you program a page to fill with a "pattern" or "rainbow" as a
background for other images that will paste on top of it?
 
Thanks!
Clara

Hello! Some of the Gifted and Talented students I work with have come across 2 problems.....help!

 

1.  How do you "un-do" a "setbg" command once it has been run? I have, of course, deleted and tried numerous times, but the background remains the same.

2.  The program has a "sleuth" searching for a hidden treasure.  When he "finds" it through a "colorunder" command, the program clears the graphics and the player can start the game again with a new path.  We only are able to "dump" the grass on the page by using the paint can.  Of course, that ruins the "randomness" of the program they have written.
How can you program a page to fill with a "pattern" or "rainbow" as a background for other images that will paste on top of it?

 

Thanks!

Clara