Instructional Drawing in Reverse

0. The drawing should make you think of layout of a city (or multiple separate cities).
1. Draw 5 non-intersecting, non-parallel lines of various lengths on the paper.
2. For each of the 5 lines, on either side of the line, draw any number of perpendicular line segments of varying lengths starting from the line, such that these line segments do not cross any existing line segments (lines may touch).
3. Pick any existing line segment. Draw any number of perpendicular line segments extending from it such that the new segments do not cross any existing line.
4. Repeat step 3 to see enclosed shapes (mostly boxes) start to form. Stop when you are satisfied with the clusters of shapes.