There are 2 parts to the song. The first part is a 4-3-6-5-1 progression, and the second part is a 7-1-2-3-6-5-1-4-3-6 progression. So, in Bb u have:
Part 1:
Eb /
D /
G / *after the repeat, go to Part 2 from this chord
F / *after the repeat in Part 2, return to this chord
Bb /
(repeat)
A /
Bb /
C /
D /
G /
F /
Bb /
Eb /
D /
G /
(repeat)
I'm sure yall can figure out chords for yourself.