The original version of Knockin' On Heavens Door by Bob Dylan.
Standard tuning.
The chords are pretty easy, but I think it sounds quite good.
Listen to the song and you'll get the strumming, too.
Intro
x4
Verse 1
Mama, take this badge off of me
I can't use it anymore.
It's gettin' dark, too dark for me to see
I feel like I'm knockin' on heaven's door.
Chorus
Knock, knock, knockin' on heaven's door
Knock, knock, knockin' on heaven's door
Knock, knock, knockin' on heaven's door
Knock, knock, knockin' on heaven's door
Verse 2
Mama, put my guns in the ground
I can't shoot them anymore.
That long black cloud is comin' down
I feel like I'm knockin' on heaven's door.
Chorus
Knock, knock, knockin' on heaven's door
Knock, knock, knockin' on heaven's door
Knock, knock, knockin' on heaven's door
Knock, knock, knockin' on heaven's door
fading out...