cellSet backFringe new cellToCell background
cellSet backFringe subset sphereToCell (0 0 0) 7.8
cellSet backHole new cellToCell background
cellSet backHole subset sphereToCell (0 0 0) 7.2
cellSet backFringe delete cellToCell backHole
cellSet backFringe new cellToCell background
cellSet backFringe subset sphereToCell (0 0 0) 7.6
cellSet backHole new cellToCell background
cellSet backHole subset sphereToCell (0 0 0) 7.0
cellSet backFringe delete cellToCell backHole
quit
cellSet backFringe new cellToCell background
cellSet backFringe subset sphereToCell (0 0 0) 7.4
cellSet backHole new cellToCell background
cellSet backHole subset sphereToCell (0 0 0) 6.8
cellSet backFringe delete cellToCell backHole