Add the animate() function from the example to the library.

[geekguy-wy]

The animate() function that provides the animation ability for the alphanumeric displays should be moved from the animation example to the library.

[jposada202020]

Could we just create a new file with the animation code, not sure all folks needs this functionality?. @makermelissa what do you think?

[makermelissa]

Yes, a new file makes sense.

[jposada202020]

This was solved by #88.Thanks 👍🏼