Note to people who may want to use this:
1. When the slider is on 0 and 1 Position actors, the value is 0 or 1 respectively.
2. The Bounds actor may take some fiddling around to get the mininum and maximum values right.
3. The Frame and Fill actors are purely cosmetic, and it won't break anything if you don't include them for some reason.
Also, just to state again, credit is highly appreciated.