Step 1: Use My Digital Studio (MDS) to create some creepy Halloween images. Most of the artwork came from the Friday Night Ensemble, item #135642.
Step 2: In MDS, go to Insert > Insert Duplicate Page Mirrored.
Step 3: Export your images as JPEG files.
Step 4: Print the reversed images on iron-on transfer paper and cut around the images.
Step 5: Follow the instructions that came with the iron-on transfer paper to iron the image onto your bag.
You can find canvas bags at a craft store. If you have old pillow cases at home—this project just got even easier!