forall delete_section()
//@code
create a, b, c, d, e
connect b(0), a(1)
connect c(1), b(1)
connect d(0), b(1)
connect e(0), a(0)
forall nseg=20
forall L=100
forall diam(0:1) = 10:40

objref s
s = new Shape()
s.show(0)
a s.color(2)
topology()
finitialize()
forall {
	print secname()
	for i=0,n3d()-1 print i, x3d(i), y3d(i), z3d(i), diam3d(i)
}