That's very cool! On Firefox you really have to scroll like your life depends on it, somewhere around 12+ full scrolls per box. The progressions appear to be s

That's very cool! On Firefox you really have to scroll like your life depends on it, somewhere around 12+ full scrolls per box. The progressions appear to be something close to the following: |A|: F6 - C7(♯5) |B|: Dmi7 - A7 |Melody|: (D A) G F♯ E I think it would be super cool to have add dynamic note selection. Maybe once you get to the |B| section you could cycle tonalities with each box. You could also have the melody be a function of each chord-duo's union of notes. I'm imagining something like the following, which is the combinations of ['mima7', 'mi7', 'mi6', 'mi(add ♭6)', 'ma7', '7', 'ma6', 'ma(add ♭6)'] and ['7', 'ma7', '7(♯5)'] |B1|: Dmima7 - A7 |B2|: Dmima7 - Ama7 |B3|: Dmima7 - A7(♯5) |B5|: Dmi7 - A7 |B6|: Dmi7 - Ama7 |B7|: Dmi7 - A7(♯5) |B9|: Dmi6 - A7 |B10|: Dmi6 - Ama7 |B11|: Dmi6 - A7(♯5) |B13|: Dmi(add ♭6) - A7 |B14|: Dmi(add ♭6) - Ama7 |B15|: Dmi(add ♭6) - A7(♯5) |B17|: Dma7 - A7 |B18|: Dma7 - Ama7 |B19|: Dma7 - A7(♯5) |B21|: D7 - A7 |B22|: D7 - Ama7 |B23|: D7 - A7(♯5) |B25|: Dma6 - A7 |B26|: Dma6 - Ama7 |B27|: Dma6 - A7(♯5) |B29|: Dma(add ♭6) - A7 |B30|: Dma(add ♭6) - Ama7 |B31|: Dma(add ♭6) - A7(♯5) You could also change the roots away from D and A. Just spitballing. I get nerdy on notes. ;)