Spiro is a add-in can be used with AutoCAD to create Spirograph (TM)- like patterns. Turn AutoCAD into an educational toy that will provide hours of fun for the whole family! Spiro creates a hypotrochoid pattern based on the specified outer circle, inner circle and pen distance. A variety of polylines created with the Spiro plugin in AutoCAD and its verticals.
This new version has some bugs fixed and adds support for AutoCAD 2016.
Available for free on Autodesk Exchange Apps here.