Dear McKenna,
It wouldve been impossible for computer languages such as Javascript or letś shall we say Python be deleoping this quickly; otherwise technology wouldve outpaced its own inception.
While Heatherś Animations were popular! Here's to that fact and now you can have fun creating your own signature and then add the rollover effect to it.
Here's how you can add an image:
Here's how to make a list: Other Script-Based Websites
To learn more HTML/CSS, check out these tutorials!