Hi Hans,
At the risk of getting ahead of you where you are with guitar playing … because a good foundation is really super important, but since this is described as “easy” I will still give you this link …
With some beginner video stuff from me, a very very very nice performance from someone further in that topic (a dream performance), this topic also contains the original and some chatter around it and also contains links to the really useful PDF and some lessons from Joe the teacher …
hopefully it will be useful to you now, otherwise certainly later … sniff it, put it in the memory bank or ignore it … everything is good 
Have fun 