Put your capo on the 1-st fret.
Start with C (actually it is C#)
Then move to Em than to F and to G.
Here is picking
  C      Em     F      G      C      Em     F      G
------ ------ ------ ---44- ------ ------ ------ ---44-|
------ ------ ------ -----1 ------ ------ ------ -----1|
---1-1 ---1-1 ---3-3 ------ ---1-1 ---1-1 ---3-3 ------|
--3-3- --3-3- --4-4- ------ --3-3- --3-3- --4-4- ------|
4----- 3----- 4----- --3--- 4----- 3----- 4----- --3---|
------ ------ ------ 4----- ------ ------ ------ 4-----|

Repeat over and over and have fun!