So, for example, the walls in the Alhambra -- I can take all of these tiles, and fix them at the yellow place, rotate them by 90 degrees, put them all back down again and they fit perfectly down there.
Por exemplo, as paredes do Alhambra posso tirar todos os azulejos, e colocá-los no local amarelo, rodá-los 90 graus, colocá-los todos de novo e eles encaixam-se perfeitamente.