There are different ways to spot light a portion of your image, in this way that I learned from Gingersnap Creations is a one layer technique.
Take your image and stamp it on the base card stock. Then mask off anything you do not want to color - you can use painters tape but suggested was post it type paper. I chalked the background as well as the spotlight image.
Stamp from Stampin' Up Fall Whimsy, stazon ink and decorating chalk.It is hard to get the correct lighting to show off the spotlight. Entering this in the Crazy 4 Challenges blog - fall challenge.