Tracés animés allows you to plot curves and surfaces,in 2D or 3D, which zooms, deforms and/or rotates in all directions. Demonstration.
To animate your curves and surfaces, you have only to add a parameter, s. This parameter will have value 0 at the beginning of an animation sequence. Then it will regularly increase, to approach 1 at the end of the sequence.
You may incorporate a function of s in different fields. Put one into the equation of the curve or the surface to deform it, and/or into the ranges of variables to make it move, and/or into the viewing angles (3D) to rotate it.
Under the expert mode (complete menu), you can also plot multiple curves and surfaces with synchronized animation.