A basic mockup of a sign-up/sign in screens along with a 2-way authentication of a uniquely generated code each time.

Using the Carousel default Pattern in Proto.io. I use a few screen interactions to turn it into an Autoscroll Carousel. Design Credits to: https://www.sketchappsources.com/resource/download-3665.html

Safe/Combination lock

A simple spaceship animation using 'Animate Item' & states. Design Source: https://www.sketchappsources.com/free-source/3673-rocket-illustration-sketch-freebie-resource.html