Wolfram Demonstrations Projecthttp://demonstrations.wolfram.com/An Open Resource of Interactive Mathematica VisualizationsCopyright 2009 Wolfram Demonstrations Project & ContributorsTranslucent Caliperhttp://demonstrations.wolfram.com/TranslucentCaliper/]]>http://demonstrations.wolfram.com/TranslucentCaliper/Drawing a Colored Polygonhttp://demonstrations.wolfram.com/DrawingAColoredPolygon/]]>http://demonstrations.wolfram.com/DrawingAColoredPolygon/Geometrical Dollhttp://demonstrations.wolfram.com/GeometricalDoll/]]>http://demonstrations.wolfram.com/GeometricalDoll/