ROCK IN A
You will find MANY rock songs in the key of A. A is the perfect key to play rock guitar in.
The three chords used here are A D E. You could play A5 D5 E5 if you wanted.
The rhythm is:
A A A D D E E E D D
Repeat over and over.
Tap your foot.
For leads you can use the Pentatonic minor or major scale in A