Can one basic shape and some rules make an interesting image? The animation shows one square at a time
is drawn with a random color. There are a few rules for turning the square left or right. Then,
let the computer repeat itself. The 3 images below are generated by using different rules
for turning different shapes.

The basic shape here is a diagonal line drawn in each box. The direction of the diagonal is
randomly chosen, then, a color is randomly selected to fill in half of the box.

The same basic diagonal is randomly chosen, but, without a filled shape. Instead, the line widths
and colors are randomly selected.

Diagonal lines of random length and direction are let loose to generate a creeping
vine growth.

Straight lines can provide a visual impression of curved surfaces when drawn in a sequential
manner.

Lines here are drawn continuously, i.e. the end of one line is the beginning of the
next line.