I have replied to Alex in another message but here is what I had said to him: So the gif of the guy walking forward is in one state and walking the other way is in another state. The way you figure out which way to walk is based on the slider. Every slider has a variable associated and that variable is a number based on how many points you can move the slider to. So it might have 10 points along the way. You always know where you are using the variable. I am at 3, I am at 4, I am at 5, etc. What I also do is create a variable to keep track of where I was. I am at 3 and I was at 2 prior, for instance. Then the next time I move it forward it would be at 4 and I was previously at 3. Because I know this now I can do a simple calculation (4 - 3) and get 1. If I am at 4 and was at 5 it would be (4 - 5) or -1. So now I can say, if it is positive 1 show the forward walking and negative 1 show the backward walking. I will have to go back and remind myself where exactly I do this.