https://jsfiddle.net/bagflesh8/s1nj6rz5/
https://output.jsbin.com/buponuxepo/
Professional cat flap installers will install your pet's door into either a door or wall. The wall-mounted version is more secure, because an intruder won't be able to get through. It also lowers energy costs and prevents draughts. The Tasker will mark the location where the cat flap is in your door, and then drill out the corners. They will also sand down the edges of the frame to give it a smooth surface. Microchip cat flaps A microchip cat flap is an easy and effective method to keep your pet safe in