That's right, it's a parametric panoramic egg, just in time for Easter!

A panoramic egg is a festive egg-shaped sugar-based confection that has a little window in it with a small sugar-formed Easter scene inside. These are typically very labor and time intensive to create.

Either edit the OpenSCAD file to suit or make use of the exploitable panoramic egg STL. For some reason the OpenSCAD file looks very different when compiled. In any case, please put something cool inside the egg and upload it as a derivative!