Basic 3 notes. (No extra)

G|----------------------------------|
D|----------------------------------|
A|----------------5~~~~~~~~4~~~~~~~~|
E|1~~~~~~~~~~~~~~~------------------|

Some variants I use. 
G|-------------7/9-7---------|
D|---3---33---------7--6/8-6-|
A|---------3-5~------4~-----6|
E|1~---1~--------------------|

G|---------------------7~~~--------|
D|---------------------------------|
A|----------------5~~~~~~~54~~~~664|
E|1~~~~~~~~~~~~~~~-----------------|

G|--------------777------|
D|--333---33----------66-|
A|----------3-5~~~~~4~~~4|
E|1~~~~~1~~~~~~~~~-------|