I was about 3 or 4 and was getting a time out. I was sitting in a little wicker chair. I was looking at the woven design in the chair arm.

Then I was then looking at the floor. I noticed he rug had a square on it that was brighter than the rug. I was looking at it and it just faded away before my eyes. A few seconds later it returned. And we went through that fade out process again. I happened to look up and saw the sun coming in the window and shining on the floor where I was. I then suddenly realized that this square fading in and out was caused by the sun shining and then going behind clouds. I was amazed.