Landscape

In 1971, I was studying Art in school.
I was offered this exercise.

1. Draw a steep zig-zag line to make a mountain range
2. Draw a less steep zig-zag line to make a range of foothills
3. Draw a smoother zig-zag line to make rolling countryside
4. Extend the lines thinly to divide the space into geometric sections
5. Paint the sections using sky, mountain, hill and field colours

In 2017 I have written this computer program to do a similar thing