Macro to Turn on/off hack?

Is there a way I could set a auto-matic timer for something like a speedhack?

Example: The keys are 7 to turn on and 8 to turn off

I go in game (CombatArms), I attach CheatEngine to Engine.exe, then I set my desired speed in the speedhack box, I go in game, hit 7, and my speedhack turns on for 30 seconds, after that time is over, the speedhack turns off for 15 seconds. *Repeat*

Meaning.. Could I make a macro to turn on/off a Speedhack, without clicking/hitting buttons?

Thanks.

You mean a hotkey? I don't know but you can try the search button, because I've seen someone post something like this already.
UCE:
http://www.mpgh.net/forum/164-combat...ner_maker.html