c 0 0 0

c 1.5 0 0

c 2 0.866025403 0

c 0.5 0.866025403 0

c 0 0 2 c 1.5 0 2

c 2 0.866025403 2

c 0.5 0.866025403 2

c 0.25 0.433012701 1

c 1.75 0.433012701 1

Kristal