a:= 1
a.minimum := -2
a.maximum := 2
b := 1
b.minimum := -2
b.maximum := 2
c := 1
c.minimum := -2
c.maximum := 2
d := 1
d.minimum := -2
d.maximum := 2
graph3d.box := true
graph3d.mesh := true
graph3d.view := standard
graph3d.perspective := true
graph3d.resolution := 70
graph3d.highlight := 0
graph3d.shading := 0
graph3d.contrast := 1/2
graph3d.transparency := 0
graph3d.color := cyan
graph3d.background := black
graph3d.minimumx := -20
graph3d.maximumx := 20
graph3d.minimumy := -20
graph3d.maximumy := 20
graph3d.minimumz := -20
graph3d.maximumz := 20
graph3d(((x - 16*sin(time))^2+(y - 16*cos(time))^2+(z)^2 = 4 , (x + 8*sin(time))^2+(y - 16*cos(time))^2+(z + 8*sqrt(3)*sin(time))^2 = 4, (x + 8*sin(time))^2+(y + 16*cos(time))^2+(z - 8*sqrt(3)*sin(time))^2 = 4 ,  x^2 + y^2 + z^2 = 16 ))