Construct an animated gif file showing the formation of the nephroid.

Construct an animated gif file showing the formation of the deltoid.

Construct an animated gif file showing the formation of the astroid.

Construct an animated gif file showing the double generation of the cardioid.

Construct an animated gif file showing the double generation of the nephroid.

Construct an animated gif file showing the double generation of the deltoid.

Construct an animated gif file showing the double generation of the astroid.