e|-------------------------------------------|
B|-------------------------------------------|
G|-------------------------------------------|
D|-3---3-3-3--3-2-1------3---3-3-3--4-3-1----|
A|-------------------------------------------|
E|-------------------------------------------|
[ Tab from: https://www.guitartabs.cc/tabs/p/psy/gentleman_tab.html ]
e|-------------------------------------------|
B|-------------------------------------------|
G|-------------------------------------------|
D|-3---3-3-3--3-2-1------0--0-0-0--1-2-2-----|
A|-------------------------------------------|
E|-------------------------------------------|
This beat just repeats over and over.
If you think that something not right, just comment below.