Z exit

[Silverthorn]

Huh? Besides the first sentence I didn't really understand what you're trying to do, sorry to say so.
You want to make a ball disappear into the wall or something like that, I'd recommend you the following method:
in that type: 3-object, put a hit_j-value lower than 50 into the flying frames so that the object will move backwards (= towards the background). After a bit (the object should be able to move around 400px to the back), make the object go to a disappear-sequence. Timers are perfectly for that. You can read about them and other type-3-functions >here<

Hope this will answer your question at least partially