No prob :D. I can't wait till/if we get loop, reset if, if, then, and wait commands! You could have lightning appear for a second, disappear for 10 seconds, then appear again, and the cycle would continue indefinitely or until said time; or if you stepped on a stone and it fell under you, when you respawn, the stone would…
On Edit Backdrop button you can not only choose the backdrop but overrides. You could add a moon, as well as new clouds, and fog and lighting etc. Sometimes it doesn't really stack right the way you want though... takes a while to tinker and test with. Though, it's important to remember that sometimes ur main backdrop…