There are two toplevel boxes, one contains only input, and all output goes to the second one. The second one may also contain some input.
A point is a 1-square.
A dotted path that is also a dotted line.
Distance = 0.
There are two or more boxes drawn inside the toplevel and sharing boundaries with toplevel.
A path is something you obtain by somehow drawing from one point to another, e.g. a line, and then starting another drawing between two points from the end point.
A dotted line is a generalized line that cycles between a color pattern, e.g.:would be a line:An extra color "transparent" may also be added to not change for that pixel.
r r g
r r g r r g r r g
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