Wave Equation Sand Castle Mold

What goes better with the beach than waves? And what goes better with waves than the [WAVE EQUATION](https://en.wikipedia.org/wiki/Wave_equation)??

We approximated the classic sand castle mold with a circle of 2-D [Gaussian functions](https://en.wikipedia.org/wiki/Gaussian_function) around a [bump function](https://en.wikipedia.org/wiki/Bump_function). Setting this as our initial condition and imposing a [Dirichlet boundary condition](https://en.wikipedia.org/wiki/Dirichlet_boundary_condition