Parametric EquationsSpirograph EquationsTurtle GraphicsRequirementsThe CodeThe Spiro ConstructorThe Setup FunctionsThe restart() MethodThe draw() MethodCreating the AnimationThe SpiroAnimator ClassThe genRandomParams() MethodRestarting the ProgramThe update() MethodShowing or Hiding the CursorSaving the CurvesParsing Command Line Arguments and InitializationThe Complete CodeRunning the Spirograph AnimationSummaryExperiments!