Board Thread:Questions and Answers/@comment-18929203-20130914090625/@comment-24024859-20131029113016

Expanding on what TheV360 says, you can also use the ON function if your movement directions are numeric. To expand on his second example, you could shorten it to this:

ON MOVE GOSUB @L, @R, @U, @D

Just make sure MOVE is zero based.