What are the actual steps one must follow to begin scripting in Voxatron?

EDIT
It was right in the API docs

EXAMPLE (global script)

1. create a script object, add it to the room, and edit it.

   old_draw = _draw function _draw() clv() old_draw() local dz = sin(time())*5 sphere(64,64,32+dz,8,7) end