camera{location<0,.5,5>look_at 0}sky_sphere{pigment{granite scale 9}}plane{y,0pigment{checker}normal{bumps scale.01}finish{reflection 1}}#macro o(a,b,c)sphere{<a,b,c>1 finish{reflection.8}}#end#local s=sqrt(3);o(0,0,-s)o(-s,0,1)o(s,0,1)o(0,2,0)o(1,1,5)