Make Noise Tempi can also do this. You could also just trigger a teletype script and then do something like
EVERY 15: CV 1 N X; TR.P 1
EVERY 16: CV 2 N Y; TR.P 2
In order to create two sequences that slowly move in and out of phase. Higher numbers lead to slower phasing, but also require a higher tempo of trigger input.
I can’t quite think of another way of doing it within teletype, though. It would be super easy to do with the txo expander, where you can set individual metronomes for each clock output and specify their length in ms.