basic:
Robot.laby_name_forward ();
Robot.laby_name_left ();
Robot.laby_name_right ();
Robot.laby_name_door_open ();

rocks:
Robot.laby_name_take ();
Robot.laby_name_drop ();

loop:
while (Robot.laby_name_look () = `laby_name_Void) do
  ...
done;

function:
let f () =
  ...

conditional:
if (Robot.laby_name_look () = `laby_name_Web)
then ( ... )
else ( ... );
