Been doing a handful of hand-coded animations in Swift lately (laterzz Objective C, it's been real).
Really liking this little accordion /squishy animation.
Super easy and fun to modify once you have it all laid out. I'd highly recommend you check out learning Swift or Objective C if you haven't already. I started in March of this year.
Check out the attachment for a higher-res look at the frames if you'd like.