Interesting, thanks for posting. I was looking for something similar although aimed primarily at drum patterns programming and later arranging them into a song, not unlike the older drum machines allowed, but more modern with visual representation of patterns as objects on screen and the ability to create variations just by cloning them for example by drag&drop then applying the needed changes, then link them together. This could be also used live, possibly creating different paths according to MIDI signals from external devices (pads? - pedalboard?) for example to choose to continue a song for a few more bars, or a different ending, a song variation based on the audience mood, etc.