Help please (Roxy Music song)

[DaveElson]

Would someone give me a hand and recognize for me the notes and note lengths for the riff (and hopefully the bass) for the beginning of Roxy Music's Manifesto. A You Tube link here. Despite trying to work it out in Guitar Pro I've come to realize I'm tone deaf. I say riff but it seems one note repeated quickly and I just can't seem to get it right.
Any help appreciated.