What looks like an 8 pointed star is, in fact, a polygon having eight vertices and skipping 3 vertices to draw each line. This results in the figure having no interior.
Note that when drawing polygons with skipping vertices, if the "pen" returns to the same vertex
used to start the drawing a new figure is started at the next vertex, thereby avoiding re-drawing the same
partial figure. To accomplish this the pen may be "lifted" and drawing resume on the next vertex, or the current
figure drawn and filled with the second (and later) figures then drawn and filled in succesive layers.
For a figure with an interior this results in different fill patterns,
see pen lift technique.