An offset which is the same as the number of teeth is equivalent to zero. An offset greater than the number of teeth is the same as that number modulo the number of teeth. On the left side of the parameter area are the non-wheel values. The color in which to draw the pattern. This value can be one of the standard Java color names, or a red,green,blue triplet where each value is between 0 and 255 inclusive, such as 255,0,0 for red or 0,255,255 for cyan.
Color names are case-insensitive.
The animate button lets you see the wheels in action. When you turn this button on, Spiro immediately clears the drawing area and draws the outlines of the wheels. When you press the draw button, the wheels start turning and the line is drawn. You can see how each wheel turns at a constant rate, and how this affects the drawing point. The resulting line is idential to the line drawn with animation turned off.