The song has 4 chords throughout the song.
F - 1st freth 2nd string / 2nd freth 4th string
Dm - f chord but with the 3rd string added on the second freth
Bb - 1st and 2nd string on the first freth, 2nd freth 3rd string and 3rd freth 4 string
F Dm Bb F Same chords through the whole song