This is in the key of A. I really like the part that stays on the IVmaj7 while the bassline moves.

I^{maj 7} IVmaj⁷ iii⁷ vi

ii⁹ vi ii⁹ vi

V ii⁶ V V^add9

IV^maj7 IV^maj7/ii IV^maj7/iii

IV^maj7 IV^maj7/ii

vi ii⁹ vi

V ii⁶ V V^add9

IV^maj7 IV^maj7/ii IV^maj7/iii

IV^maj7 IV^maj7/ii

vi