inverting output values.

I'm making a level where a joystick rotator is supposed to match the way the thumbstick is pointing. i attached up/down to up/down on the rotator, and left/right to left/right on the rotator. left/ right is working fine, but up/down seems to be inverted.

Is there any way to invert values of an output?

just take out a direction splitter and a combiner, then just wire negative to positive and positive to negative

Ok, now that I think about it, that sounds pretty simple. thanks