Determing FPS within another FPS .. How?

[SMcNeill]

Why not use _LIMIT to set the FPS and then calculate position/graphic based on it?

Mouth_Open = X times per second or Limit / x
Mouth_Closed = Not Opened  

Move = x pixels per second or Limit / X

Mouth should open 5 times per second?  On limit 30, it's open starting at 0, 6, 12, 18, 24 on your loop counter, for 3 loop count, for example.