Answer:
Autumn is giving a midsummer festival.
Oh what a joy!
The trees dress themselves in splendid hues of amber, ochre, and bronze.
The birds rehearse their flying encore before next year, the squirrels bring their harvest of pecans.
Oh what a joy!
The harvest moon lights the dance floor. Autumn leaves dance with the wind and take their final bows as they land on the ground.
They've spread a carpet for the guest of honor, Lady Diana. She waltzs through, pursued by Jack Frost who soon decorates the forest floor with delicate frost.
Until next year, we will dance again.
When Autumn gives another midsummer festival.
I hope I helped! Feel free to do editing of any sort. This is my first free verse poem and I hope I met all your requirements.