I don't know about how they did it, but you just need a program that can make gif images. GIMP is a free one that you could use to make smilies and animate them. You have to make individual images of each frame of the smilie and the program links them together, displaying one frame at a time.
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Christmas Music
Macy's Thanksgiving Parade
Sesame Street debuts on Netflix
Back to the Rock Season 2
Sam and Friends Book
Jim Henson Idea Man
Bear arrives on Disney+
