I learnt this by ear, so i'm not sure if it's accurate. Enjoy :)
[ Tab from: http://www.guitaretab.com/numeric/5-seconds-of-summer/378080.html ]
E ------------------------------------------------------------|
B ------------------------------------------------------------|
G ------------------------------------------------------------|
D ------------------------------------------------------------|
A --2-2-2-2---------------------------------------------------|
E ---------2-0-0000--4-4-4-4----2-0-00-22---------------------|