Killin’ Floor
Howlin' Wolf
standard tuning

riff 1
G|-----------------|
D|-----5-5-3-3-----|
A|-------------5-5-|
E|-3-3-------------|

riff 2
G|-----5-5-3-3-----|
D|-------------5-5-|
A|-3-3-------------|
E|-----------------|

riff 3
G|-----7-7-5-5-----|
D|-------------7-7-|
A|-5-5-------------|
E|-----------------|

at the end put in this:
G|---------|
D|---------|
A|-4-5-6-7-|
E|---------|

watch for when they all come in, but it should be fairly obvious, as the music will change.