Option 1: Using 2 ready made magnetic stickers.
Step 1: Install 1 magnet on each side of screen back to back. (May offset due to polarity)
Option 2: Make your own magnetic stickers.
Step 1: Get magnetic sheet to your required size, one side should already have adhesive if not spay adhesive will be required.
Step 2: Place 2 sheets together to see if magnetic field is strong enough, check that polarity is matched, if offset just flip one sheet over.
Step 3: Cut out 2 photo's and adhese to outer side of each magnetic sheet (This will give yo a photo inside and out - make
different and rotate appearence when you want)
Step 4: Install 1 magnet on each side of screen back to back.