ESCHER ANIMAL DRAWINGS

There is a guitar in the middle of all these tessellated menageries . . . . . 
plus a couple of humans?
Sometimes the DARK figures stand out and the LIGHT ones become the BACKGROUND ? or maybe there isnt any background . . . .the LIGHT figures  stand out . . .good exercise and training for the eyes I tell myself . . .forces me to LOOK and LOOK again . . ..I like looking at these works of art over and over again as each time I see something I hadn't seen before!