I've tried throwing bug.

Use tools:macrolua.
http://code.google.com/p/macrolua/

Sample command.
_R.U._D.^RL.W38,_3.W15,^3.W9,^D3._U.W5.5.5.U5.U.U.U.U.^U.._D........W70,

_L_D.W59,^L.^D.R._DL.L.L.L.L.L.L.^DL.._L._6._3.W40,^3...^6