With a small step you get an inner weave of the butterfly, with a high step you get an outer weave
A butterfly draws a ... butterfly. Minimal version of a more complex but very cool project by Dapontes. Mathematical model has been borrowed from Modellus examples. ---- This is yet another remix (see one from Tziortzioti) allowing you to weave a spider-like web arround the butterfly by playing with the step for the independent variable t.
