cellSet backFringe new cellToCell background
cellSet backFringe subset boxToCell (-14 -14 0) (14 14 5)
cellSet backHole new cellToCell background
cellSet backHole subset boxToCell (-13 -13 0) (13 13 5)
cellSet backFringe delete cellToCell backHole

cellSet refineFringe new cellToCell refine
cellSet refineFringe subset sphereToCell (0 0 0) 7.8
cellSet refineHole new cellToCell refine
cellSet refineHole subset sphereToCell (0 0 0) 7.2
cellSet refineFringe delete cellToCell refineHole


cellSet empty new labelToCell 0 ()

quit