These animations test the behaviour of a frozen to animation that adds to
other animations.
Expected result:
The first animation should follow a decreasing wave pattern and then
cease moving once it reaches the right. This is because the to animation
is frozen and completely constraints movement on the y axis.
The second animation should follow a decreasing wave pattern but once it
reaches the right should move up and down again to the full magnitude of
the wave. This is because the to animation is not frozen and so the
repeating wave pattern is no longer dominated.
The third animation should start to follow a decreasing wave pattern but
then mid way through remain at a constant height. This is because once
the to animation is frozen it overrides any lower priority values.
In each case the path followed by the box is shown as a dashed line.
Please note however that this path is an approximation only.