How do I make a moving signature?

[StarlettStarstone]

How do I make a moving signature?
One of my friends has dogs that run but I can't figure out how to do that, I wish to make some running deer or flying bats.
Just something because my signature is so boring.

Please help! I need a better signature and can't figure out how.
P.S. how do I turn flash on?

[Chickengood6]

I also would like to know how to make one!