Just so you know, you can't program in HTML, since nothing gets executed.. ever HTML is a mark-up language, not a programming or scripting one.
You sure? A browser executes the html and does a bunch of stuff depending on what is contained in the html. You can use html to make a GUI to control a robot if desired similar to below.
Please enter a valid email to subscribe
We need to confirm your email address.
To complete the subscription, please click the link in the
email we just sent you.
Thank you for subscribing!
via Egeo 16