Ohhhhh! I see what this is doing. I forgot that WAIT N waits N frames, not milliseconds. I wonder what this could be used for.
DEF WAITMILLISEC NUM M=MILLISEC WHILE MILLISEC-M<NUM WEND END
Root / Submissions / [.]
DEF WAITMILLISEC NUM M=MILLISEC WHILE MILLISEC-M<NUM WEND END