Here it goes, when the key doesnt sound right I think its an octave higher (my understanding of an octave being 5 flat keys). LOL. I will make a note of where it is different, its really hard to show. Try the video if you're unsure.

Bb-Db
Bb
F
Gb
Db
Eb
Bb
Db
Ab
Eb
Bb
Db
Db?
Db (one octave? [five keys flat keys] higher than the last)
Db
Eb (one octave? [five keys flat keys] higher than the last)
Gb
Gb (Same octave this time so the same note just twice)
Db
F
F (Same octave this time so the same note just twice)
Gb
Ab

Thats as far as I have got, its ruff as I say and I hope you can understand it a little bit better.

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