We have this little mat that we put on the stairs landing (there was a big stain there when we moved that won't come out). Every morning the mat is moved. I discovered by who now... it's my little trouble maker, Sophie. I almost stepped on her before I took the below pictures.
How cute! She reminds me of the cat in another post, where her face was black on one side and... calico? If I remember right, on the other. My cats like to hide toys, pencils, straws, hair ties, and little pellets of pine litter under my rugs.