Spinner Revisited

Here's conceptual way to make spinner from Thursday. Start with this pentagon pattern below. This can be generated by the following polygonR&D code.

start {
  scale 0.4
  create pent
}
pent {
  sides 5
  ifon none {
   paint green
   sides 5
   paint olive
   create pent
   3 right
   create delay
 } { }
}
delay {
  create pent
}

The delay subprogram allows the pattern to development more symmetrically; without it, there would be a radial seam that would break the symmetry (C₅). To add spice to the pattern alternating triangles can be inserted (the zig-zag construction described in Zigzag Grid). To do this, the pent subprogram must be revised like so...

pent {
  sides 3
  ifon none{
    paint olive
  } { }
  sides 5
  ifon none {
    paint green
    sides 3
    left
    paint green
    sides 5
    paint olive
    create pent
    3 right
    create delay
  } { }
}

Finally, some extra triangles are added for decorations to get the original spinner pattern. The colouring of this pattern highlights the triangle- pentagon- triangle groups. It is interesting to see how the colouring has such a dramatic effect for each pattern. A seemingly simple change of switching the green and olive completely ruins the aesthetics of this pattern. The five pointed stars completely dominate instead of being a balanced part of the pattern.