The beat the song is built on is one bar, played through bars 1-3, 9-15 and 25-27, and 3 more places -- 30% of every bar the kit plays. That is the spine of it; everything else is what happens around it.
It is played on the kick, counted in sixteenth notes. On its own it scores 0 out of 100 -- straightforward -- and the thing that decides that is how fine the subdivision is.
The whole song is 34 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 60 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 60, 70 and 80 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 one-bar groove on kick, in 4/4 at 80 BPM, counted in sixteenth notes. It is written out above, and it covers 30% of the bars the kit plays.
Bars 1-3, 9-15, 25-27 and 33-36, and 2 more places. The time is kept on the kick and crashes to start with, and it changes 17 times over the song.
0 out of 100 on its own -- straightforward. The song as a whole is 34 out of 100 -- a fair first song -- with the independence between the hands and the feet the part that decides it.