Sometimes, a simple animation from point A to B just isn't enough, and you need to define motion along a path.
To define the path that an animated object will move along, we can use curves either made of straight segments (polygonal curves), or quadratic Bézier curves with a single control point. To conceal an animation's motion path, give it a width of zero pixels. If the curve is a closed loop, make sure that any fill effect is removed. A path with no visible line or fill-effect is known as a hidden shape, and will have a dashed outline.