vertices =

a = 10.1

b = 3.1

s = (a + b) / b

o = 

i = from  to (**PI)

j = mod(i, *PI)

k = mod(s*i, *PI)

m = a*sin(j)

n = a*cos(j)

x = m + o*sin(k)

y = n

z = o*cos(k)

vertices = 

t = from (0.0) to (*PI)

r = 

a = rand2(PI*0.1, PI*0.9)

s = sin(t)

c = cos(t)

x = r*s*cos(t/sin(a))

z = r*s*sin(t/cos(a))

y = r*c