I want a sprite to appear now and again (and then disappear after a few seconds). I've tried using the “timer” and different funky math equations with “random” thrown in, but when time comes and I “broadcast” a message to show the sprite it gets broadcast a LOT (because the timer is so fast?). I'm sure others have come up with a smart way to make something happen NOW AND AGAIN. Please help.

Set a variable to a random time and reset the timer. Show or hide the sprite and wait until the timer exceeds the variable's value. Repeat.

Perfect! That did the trick. Thank you deck26!

You can use a wait block in side at repeat block like this:\
Repeat forever
“Your Command”
Wait _seconds