Sfääri tekitamine

t1 = 6.283185307179586 (slider from 0 to (2 * π))
v1 = 3.1 (slider from 0 to π)
a = Surface(((3 * cos(t)) * sin(v)), ((3 * sin(t)) * sin(v)), (3 * cos(v)), t, 0, t1, v, 0, v1)