Turing Tumble Community

Paul's puzzle 45 solution - 39 parts

Here’s my solution (it’s the one from the book):

And here’s the link:

http://www.lodev.org/jstumble/?board=rre1erelrere0e0relllllr0r0relllllr0r0lelrlxerexlrei

Description: The left and right registers count down in turn, starting with the left register. If the left register underflows first, a blue ball goes into the interceptor. If the right register underflows first, a red ball goes into the interceptor.