Below is my script.  Can you please tell me why I keep getting exit code 0, and the script stops?  I'm expecting it to just idle in the background and await my hotkey pressing. 
 
 Global $Paused
HotKeySet("F7", "Cycle2")
HotKeySet("F8", "Cycle1")
HotKeySet("F9", "Cycle3")
Func Cycle3()
  $Paused = NOT $Paused
  MouseClick("left", 920, 755, 1, 25) ;taskbar
  MouseClick("left", 776, 598, 1, 25) ;region
  MouseClick("left", 575, 565, 1, 25) ;pgdown
  MouseClickDrag("left", 325, 310, 500, 575, 25)
  Exit 0
EndFunc
Func Cycle2()
  $Paused = NOT $Paused
  MouseClick("left", 920, 755, 1, 25) ;taskbar
  MouseClick("left", 776, 598, 1, 25) ;region
  MouseClick("left", 575, 565, 1, 25) ;pgdown
  MouseClick("left", 575, 310, 2, 25) ;up
  MouseClickDrag("left", 325, 310, 500, 575, 25)
  Global $Paused
EndFunc
Func Cycle1()
  $Paused = NOT $Paused
  MouseClick("left", 920, 755, 1, 25) ;taskbar
  MouseClick("left", 776, 598, 1, 25) ;region
  MouseClickDrag("left", 325, 310, 500, 575, 25)
  Local $i = 0
  Do
      Sleep(2000) ;2-second sleep
      Cycle2()
      $i = $i + 1
  Until $i = 7
  Global $Paused
EndFunc