Your hive draw looks a lot more sophisticated than the one I made.
It should proove to be very useful

I'll have to give it a try soon.

One thing I noticed is you don't add +1 after calculating the modulo.

So it looks like you are calculating from 0 to n-1 with position 1 actually being 0. That or it is impossible for the top number to be called. I know you called .len but I'm not sure exactly how it works (I'm still just really noob).