Yes, as I supposed,
this is the generation of your random number. This you enter in your equation "random6"
 
In the cell you enter the same as in the left cell (with "random6")

 

Joffm
Thank you very much for your help!
 

And this is, how I'do it.
 

Have a look at the short implementation of your images.

Joffm

I am still not really sure about the conditions "DPP and degree" and "DPP left and DPP right".
But you know how it works.