TESS Patterns

TESS is a program which generates repeating surface pattern designs spontaneously. The program first selects one of eighteen schemes, or sets of rules, for creating a small square pattern in the upper left corner of the computer screen. Then it displays the pattern and propagates it in both directions so as to fill the screen. As it displays or prints the rows, the program may sometimes indulge in some row transfomations, such as reversing and sliding, so as to add some more variety…