Tumblr has a very nice series of animations that happens when you enter the compose mode. I thought it would be interesting to recreate this in Proto.io to show others how to achieve these kind of effect in their own protototypes.
I have made a companion tutorial video where you can see exactly how I did it. This video is available here:
http://docs.proto.io/videos/recreating-tumblr-compose-animations-in-proto-io/
Using color adjustment and filters, I've simulated the iOS spotlight animation. Learn how you can apply these filters at https://proto.io/en/new-features/adjustments-filters/
If you need to get the Y position of a vertically scrolling container, create a text box. Then on the container scroll trigger, set a variable that evaluates the numerical callback value from the event (Y position). Then add a callback that changes the text property of the text box by reading from the variable.
Re-creation of the onboarding sequence of the app "Service"
See how it was done step-by-step in the on-boarding webinar:
http://docs.proto.io/videos/creating-great-on-boarding-experiences-with-proto-io/
The app itself:
https://itunes.apple.com/us/app/service/id1005945537?mt=8