d|----------------------------|
a|----------------------------|
f|----------------------------|
C|----------------------------| repeat this to get the main riff
G|-------0---0------2-----2---|
D|--0012---2---2210---00---01-|

d|-----0~-----------------------|
a|-----0~-----------------------|
f|------------2-2-2-2-2-2-2-2-2-| this is the "memoria riff"...after that
C|--4-----4-4-2-2-2-2-2-2-2-2-2-| start again with the main riff
G|--4-----4-4-0-0-0-0-0-0-0-0-0-|
D|--2-----2-2-------------------|

d|----------------------------------|
a|------------------3-3-3-3-3-3-3-3-|
f|--4-4-4-4-4-4-4-4-2-2-2-2-2-2-2-2-| this is the "and i swear that i don?t
C|--4-4-4-4-4-4-4-4-0-0-0-0-0-0-0-0-| have a gun"-riff,you just have to
G|--2-2-2-2-2-2-2-2-0-0-0-0-0-0-0-0-| repeat it as often as you need it
D|----------------------------------|

d|----------------------------------|
a|-----5~7~~---5~7~~---5~7b~~7-5~~--|
f|--6~~-----6~~-----6~~-------------| repeat 4 times to play the solo
C|----------------------------------|
G|----------------------------------|
D|----------------------------------|

So,now you got all riffs that you need the whole song "Come as you are" by 
Nirvana...just tune your guitar down to standard D-tuning and play along with the song...i did it 
too,and now i know how to play the whole song