Optical illusion !! Or ?

What do you see at first glance. I thought when I saw the picture. " Hey where did you photograph that water ?"
But it was the stump in the woods. The color and the drawing of the tree stump put me on the wrong track.
It felt strange that I thought for a moment that I had forgotten that I had photographed a stream of water. haha.
It was very busy today. After the holiday a lot has to be done and next week it will also be busy with all the appointments in the agenda.
But Wednesday and Thursday are the nicest days. Then Milan comes again and we can enjoy our little man again.