If you go to the url below you'll see that the company Onnit has this cool countdown timer, they place it in their emails for offers and such. I am trying to figure out how it works so I can make one. I noticed I can save it to my computer as a gif which I found to be interesting, how the heck do you make something like this? Is it really just a gif? I also noticed that if I modify the url it changes the the countdown date.
Thanks for your time? https://www.onnit.com/emails/_module...0:00:00&dark=1