MAX_SPEED right_motor.forward MAX_SPEED when 'right' left_motor.forward MAX_SPEED right_motor.backward MAX_SPEED when 'up' left_motor.forward MAX_SPEED right_motor.forward MAX_SPEED when 'down' left_motor.backward MAX_SPEED right_motor.backward MAX_SPEED when 'space' left_motor.stop right_motor.stop end end ! work do puts "Ready!" on keyboard, :key => :keypress end