Hi, i've been working on my uni project but i've gotten stuck. My lecturer has been helping but hasn't replied in a few days and kinda need this sorted out now.

I basically want the ball in my patch to control a slider when being moved up and down, ive gotten to the step where i can control a slider left and right but i dont really know how to seperate the 3 values for the position.

p.s. the red text is my lecturer notes when he was helping.