Did you pick up the beat? Eb---G-Ab----Bb bass, roll your own right hand chords. Maybe Eb,Eb, Ab,Ab using the proper inversions. Then they move up to F. Listen closely, you will hear the F about to start. F---A-Bb----C. Right hand chords maybe F,F, Bb,Bb using the proper inversions. There is a little movement from the beat, but you will pick that up. It is in the key of Eb and F
Berbie