Mystery Painter

It really didn't take much to figure this out - but there was a ghostly painter roaming in the halls at our house:
(no, it's not Joyce being blurred in the background)

Anyone 3ft high could probably tell where this was coming from - So I bent down and snapped a photo from there it was being "PROJECTED"...

If you can imagine a RED light and a WHITE light being shadowed by the flowers in the window- this is how this image was being created. In this case, it is the 'shadow' that is letting in the alternate colored RED & WHITE light.

Where there was a shadow from the RED, the WHITE came through -

Where there was a shadow from the WHITE, the RED came through.

It was just such a fascinating combination- it actually looked like some flowers on the wall.