F3::
Sleep 3000
Loop
	{
	If stop = 1
	exitapp
	Else
		{
		MouseClick, Left
		Sleep 2000
		}
	}
return		;ends your program and leaves the script running to launch again
;exitapp	;this will exit your program once the loop is stopped with break.  as an alternative, you can replace break with an exitapp



F4::
stop = 1
Sleep 100
Return