If 
, then
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is a weighted average of 
and 
.
This simple idea is the basis for the way that a teenager gradually turns into a werewolf. Since 
, we can take 
and 
and create a series of pictures of 
as 
increases from 
to 
to observe Fred morph into a Werewolf. Note that if 
, then 
, and if 
, then 
. If is somewhere between and , then 
is some mixture of 
and 
.
It and are numbers, then it is not very exciting to watch morph into . More interesting is to take two pictures and , then create an animation that shows a series of pictures of as increases from to . Perhaps most interesting of all is to look at the case where and are three-dimensional objects.
In the examples, two objects and are given, the animation is shown, followed by a set of instructions for using Scientific Notebook to actually construct these animations.