How to make emojis appear and float up after form submit

I don’t have anything built yet, I’m still in the design phase. I was just tossing around this idea for a new website I’m working on.

I want to have a contact form, and when someone submits the form successfully, I’d like to have like 5-10 or so heart/fire/sunglasses face emojis floating up from the bottom of the screen briefly.

The best example of this I can find (Except I’d like them to come up from the bottom):

Is this possible? How hard would this be to accomplish?