How to take a live photo on my iPhone 6?

I have an iPhone 6. Two days before Valentine s Day in 2016, my friend Katie took a picture of me and did a live photo. I just don't know how she did it! No apps, just the camera.

You hold down while taking the photo or you click live photo in the "filters thingy"

The iPhone 6s can take live photos, but the iPhone 6 can't

Press like you're going to take a photo, and hold. Or you can do it with any phone since the dawn of time, it's called a VIDEO.