Creating hotkey that launches a program and performs a loop and closes it if used again

Hey all! This is probably the most simple request in the forum that will make most of the experienced users go "DUH!"

Being a total noobie I'm still trying to figure things out. Basically wanted to create a hotkey that will launch a program, then run an infinite loop within the program until the hotkey is pressed again.

So far I've made this...and while it launches notepad, it won't enter the A, B, C text. Any tips?