The chord progression for the backing tracks to pattern 1 and 2 above is: ||: G | Am | C | D | Em | D | C |G/D :||

This is the classic ‘Cup Song’ rhythm from the movie Pitch Perfect, try playing along with the song ‘When I’m Gone’ using this YouTube link : https://www.youtube.com/watch?v=6y1aOg_UO_A