Illusion or Cotton Reels? Quilted Wall Hanging(1)

What do you see, an illusion or cotton reels?  You choose.  

A square quilted wall hanging with four 'illusion' or 'cotton reel' blocks in black, white and grey.  The wall hanging has been quilted in narrow vertivcal lines.

On the back of the wall hanging is a hanging sleeve so that a piece of batten wood or rod may be inserted (not included).  

The wall hanging measures approximately 26 1/2" x 26 1/2" or 67.5 cms x  67.5 cms.