We got this idea from a crafts to do with kids mama blogger/newsletter. And I want to credit her, however I honestly forget who it was. My apologies.
We did this about a month ago, so you may need to save this idea for next fall.
Take a nature walk and collect leaves.
Lay them out in a design on clear contact paper. Add a ribbon for a hanger.
Voila! We have a beautiful window of color to help brighten our window.