Tessellating Textures !
"The regular division of the plane into congruent figures evoking an association in the observer with a familiar natural object is one of these hobbies or problems... I have embarked on this geometric problem again and again over the years, trying to throw light on different aspects each time. I cannot imagine what my life would be like if this problem had never occurred to me; one might say that I am head over heels in love with it, and I still don't know why." - M.C. Escher