Tomorrow Never Knows

HH = Hi-Hat
SD = Snare Drum
BD = Bass Drum

Here's the only the beat in the 
song.  The beat or the song
Continues after the ad
never changes.  Ever.

HH  1n1n 2n2n 3n3n 4n4n
SD  ---- 2nnn ---- 44nn
BD  1nnn ---- 3n3n ----