Dials - Layers

Your dial layer works. Right now it is set to hide other layers. When it changes, another layer is opened, then faster than you can see, the dial layer opens and closes all other layers.

Also, the way the settings are right now, value 3 is off the slide, so it is difficult to turn it to see flora.  Experiment with dragging the green triangle, the red triangle, and the yellow diamond, as well as rotating it to get the arc and numbers visible on the slide.