Basically it's D - G - D - A OR E - A - E - B The strum pattern is a bit fast so I'd recommended watching the actual song to
figure it out. I just do up-down-up-down-up really fast xD 
DG Beer beer beer beer beer beer beer beer beer beer beer beer beer beer {Repeat as
DA many times as Beer beer beer beer beer beer beer beer beer beer beer beer beer beer you like}