1.) Using Explicit and Implicit 'for' Loops
         circle_demo_slow.m
         circle_demo_fast.m

2.) Polar Plots
         polar_plots_cart.m
         polar_plots_polar.m
         polar_plots_both.m

         polar_plots_movie_cart.m
         polar_plots_movie_polar.m
         polar_plots_movie_both.m

3.) Using the 'plot' command
         rainbow_simple.m
         rainbow_fancy.m
         rainbow_arch.m

3.) Complex Numbers using Euler's Identity
         cn_eulers_id.m