The beat the song is built on is a 2-bar phrase, played through bars 3-9, 11 and 13-16, and 11 more places -- 32.4% of every bar the kit plays. That is the spine of it; everything else is what happens around it.
It is played on crash, hi-hat, snare and kick, counted in thirty-second notes. On its own it scores 14 out of 100 -- straightforward -- and the thing that decides that is how fine the subdivision is.
The whole song is 48 out of 100, so the beat is not the hard part: what costs you is everything around it, the joins and the fills.
The room opens this beat on its simplest reduction, at 90 BPM, and adds the notes back a rung at a time -- 3 of them. Nothing is a matter of opinion: each rung has a tempo to reach and a gate to pass before the next one.
Tempo goes 90, 105 and 120 BPM, and the gate at each one is 8 loops in a row with no wrong note and no wobble in the time.
PRACTISE THIS BEAT →A 2-bar phrase on crash, hi-hat, snare and kick, in 3/4 at 120 BPM, counted in thirty-second notes. It is written out above, and it covers 32.4% of the bars the kit plays.
Bars 3-9, 11, 13-16 and 19-35, and 10 more places. The time is kept on the silence to start with, and it changes 8 times over the song.
14 out of 100 on its own -- straightforward. The song as a whole is 48 out of 100, a step up from a first song, and the work is in how often it moves around the kit.