Animation of the mask property
A mask element and a path referenced by a use elements
are chosen to define a mask for the same path to be
painted. The visual effect of the animation is, that
for 3s only the outer part of the stroke is visible and
for the other 3s just the inner part including fill, for
another 3s no mask is used.
Click object to set stroke to none for 3s.
Masked path: Click to stroke none