How do I make those little wallpaper stickers on imessage?

[iMore Question]

I've seen these stickers with a black background with a neon glowing heart on them sent via iMessage. How do I do those?

 

[pkcable]

Probably either a heart sent from an Apple Watch, OR one of the new features in iOS 10.

 

[ReeHelp]

You can download 'neon glowing hearts' gifs or images and send them along with your messages by selecting the Camera button and choosing it from the Photo Library.

 

[pkcable]

Did it look like this?