Jack Lew Signature Function
On January 9, 2013, Jack Lew was nominated to be Secretary of the Treasury. His unusual signature could soon be on all new US currency. The signature can easily be modeled with sine and cosine functions via Fourier analysis (use the initial settings).
The curve has parametric equations ; . You can adjust the coefficients using the controls.
 C. Pierce, "Jack Lew's Signature," The Politics Blog, Esquire (Jan 10, 2013). www.esquire.com/blogs/politics/jack-lew-signature-011013.