Traditional Islamic design work can be viewed in many ways. For a Sketchpad enthusiast such designs can provide challenging and inspirational construction projects. Below is an illustration of such a project. It starts with an image of tile work photographed in the Alhambra, and it continues with some Sketchpad exploration.

Here's the image:

There are lots of ways to view the image, but one way is to see it as a "seed," which is rotated, and then the result shifted many times to produce a result similar to the image. Here's the way that process proceeds. First, the seed: (There are several possibilities.)

and the rotations of it

and then a couple shifts of that result:

Now, the power of Sketchpad can be used to vary this design. (To be continued!)