Drag the points and hit the go button when you're ready. To stop the rendering process, hit the button again.
The apples are control points. The orange lines are linear Bézier curves traced by the oranges, the yellow curves are quadratic Bézier curves traced by the stars, the green ones are cubic Bézier curves traced by the tennis balls, and the blue path is the quartic (fourth-degree) Bézier curve traced by the blue button labeled with an O.
