((#(0.5 0.6 0) #(0 1 0) #(0 0 1))
(#(0.5 -0.6 0) #(0 -1 0) #(0 0 1))
(#(0.5 0 0.6) #(0 0 1) #(0 0 1)) 
(#(0.5 0 -0.6) #(0 0 -1) #(0 0 1)))