Load this image in Gimp, scale it so that the center of the circles are physically about 60mm (2.5") apart. On regular screens (~100DPI) you can just zoom out to 66%). Then get close until you see a third object in the middle of each pair. The top one is a pit, the bottom one a pyramid.
Gimp, ofn-path-to-shape+path-inbetweener. Now back to coding
Gimp, ofn-path-to-shape+path-inbetweener. Now back to coding