Tenish ellipses with differently colored top arcs and bottom arcs. in a gnuplot titled 'all-halves'. The ellipses have random eccentricity and orientation, but are heavily overlapping in the picture. different from the previous one.
https://gamerplus.org/system/media_attachments/files/114/584/135/690/196/051/original/9ecde03021bae5c2.png