This isn’t a piece of music, it’s just a sketch. But it illustrates something slightly odd that you can do with Reason 7 and a couple of simple Rack Extensions. The CV-8 (from DLD) is a simple device — it accepts up to eight channels of gate and CV signals (pairs of CVs, in fact) and outputs the most recent values. Strap that to three Matrix step sequencers that are playing sequences of different lengths, and you can generate a complex pattern.
Then send the pattern to three different synthesizers, each of which is being processed by a delay line — but delay the CV and gate signals to two of them using Jiggery-Pokery Lolth. Here’s the result: