Apple’s new iPhone 6s and iPhone 6s Plus were released less than a week ago and more than 13 million people took delivery of a new iPhone by the end of the day this past Sunday. That’s a whole lot of iPhones. While everyone is hyper-focused on what’s new in Apple’s latest iPhones — check out our iPhone 6s review for everything you need to know — there are also some people who are feeling a bit nostalgic. One person posted a YouTube video about the differences between using the original iPhone and the new iPhone 6s, for example.

Here’s another little morsel to make you feel nostalgic:

DON’T MISS: iPhone 6s review

iOS app developer David Barker posted the GIF below in a tweet earlier this week. It shows every single iPhone that has ever been released, from the first-generation model all the way through the brand new iPhone 6s and iPhone 6s Plus, being unlocked with a single swipe.

It is cool? Yes. Is it pointless? Definitely. But watching those 12 iPhones being unlocked with one swipe is somehow both mesmerizing and incredibly nostalgic. Enjoy.