Can someone please give me some background information on Angels and Devils by M

Question: Can someone please give me some background information on Angels and Devils by M C Escher!?

I'd just like to know if the painting has any psychological meaning based on whether you see the angels first or devils!.!.!.

thanks!Www@QuestionHome@Com

Best Answer - Chosen by Asker:

This is the only thing I could find about it!.!.!.!.

from: http://www!.worldofescher!.com/gallery/A8!.!.!.!.

"Here, too, we have the components diminishing in size as they move outwards!. The six largest (three white angels and three black devils) are arranged about the centre and radiate from it!. The disc is divided into six sections in which, turn and turn about, the angels on a black background and then the devils on a white one, gain the upper hand!. In this way, heaven and hell change places six times!. In the intermediate, "earthly" stages, they are equivalent!."

Reprinted from the text of 'M!.C!. Escher - The Graphic Work'Www@QuestionHome@Com