I've created this a few times in different ways.
I'm running two step effect fades (cascade, forward, positive) on HTP subs, over the intensity parameter of a series of RGB leds. One effect goes right to left, one left to right. If I play one effect at a time it will start and run the effect through properly. If you run both, they will honor HTP and appear to fade through each other. If you start these effects at different times you can create different patterns and it works as you would imagine it should. If you start them at exactly the same time, with either a double bump tap or a synchronized macro, then one of the effects will do one cycle backwards just after the initial one. After the one cycle it continues as it should.
