  ROBOFORTH  Initialize the ROBOFORTH interpreter.
  START      Start the robot.
  CALIBRATE  Tell the arm to calibrate itself.
  READY      Send the arm to the READY position.
  HOME       Send the arm to the HOME position.

  [X Y Z] MOVE    Relative move.
  [X Y Z] MOVETO  Absolute move.
  [VAR] ?         Print variable VAR's value.
  [VAL] [VAR] !   Set value of variable VAR to VAL.
