That riff in Phantoms by Meshuggah, explained

I have noticed a lot of people online being puzzled by the pattern in the final riff of Phantoms (from Meshuggah's latest album Immutable), so here's a poorly animated video where I try to explain what's happening. All the essential information should be in the video itself but I will gladly answer any questions if something's not clear. Also the song fucks really hard in case it needed to be said