Hello there, the tune starts like this
e---0---0---0---
B---2---0---0---
G---2---2---1---
D---2---2---2---
A---0---2---2---
E-------0---0---
It starts by doing this a few times then then it changes slightly
e---2---0
B---3---0
G---4---1
D---4---2
A---2---2
E---2---0
I can't be arsed weiting out a rythm but you should pick it up pretty easy
then:
[ Tab from: https://www.guitartabs.cc/tabs/j/jj72/oxygen_tab_ver_5.html ]
e---2---2---4---5
B---3---3---5---6
G---4---4---6---7
D---4---4---6---7
A---2---2---4---5
E---2---2---4---5
then start strumming the dm fast and then wuickly move up to a dm at
the 12th fret:
e---13(15)
B---15---
G---14---
D---0----
A--------
E--------
Strum this for a bit and add the G with the little finger
(you'll pick it up from the song)
and then go back into the starting chords again
cheers
TOM