Step 1: Fold your felt in half so the crease is on the bottom. Then, place your laptop or tablet so the bottom is on the crease of your felt.
Step 2: Place your cardboard on your table. Unroll your stencil film so it is on top of your cardboard. Use a heavy object to keep your film flat. Plug in your stencil cutter and wait for it to heat up. While your stencil cutter is heating up, begin to draw random triangles in different sizes on your stencil film, or you can just wing it like I did. ;) You will want your triangles to go about 4 inches wide and you will want make sure you go the entire length of your laptop/tablet.
Step 3: Start cutting out your triangles using your stencil cutter. Use the tip to go over your marks to cut out the inside of your triangles. Once you have cut out all of your triangles, tape your stencil to your folded felt. I tapped mine a little off-centered. You will want to place a piece of cardboard in-between the two layers of felt to reduce any paint from leaking through.
Step 4: Dip your pouncer into your paint. Then, begin going over your stencil filling in all of your triangles. Once you have filled in all of your triangles, let your paint dry.
Step 5: Once your paint is dry, turn your felt inside out so your pattern is in the inside.
Step 6: Place your laptop/tablet on your felt with the bottom at the crease of your felt. Then, trim all of the around your laptop/tablet so you have an inch of fabric. Sew the two sides of your felt either by hand, or with a sewing machine. Turn it right side out and you are finished!