Using variables to change the opacity of items Design Downloaded from: https://www.sketchappsources.com/free-source/2567-chandelier-lighting-illustration-sketch-freebie-resource.html

Interactive TV app prototype of Hulu's home page. Use the arrow keys on your keyboard (note: mouse click to enable keys) or map to a remote control on a television screen to explore a Hulu like home screen with proto io. Note: Must click the canvas to enable key presses, this seems to be a common restriction with most prototyping tools when building key press focus interaction models.

Swipe to see some Porsche models. Tap on a car to get more information on that car. The project is using States and State animations

A demo showcasing custom device size, animations and key actions. Use arrow keys to switch between "Play" and "Settings", and X and Z keys to navigate.

A demo created using draggable and rotation features.

I simulated a 10 second timer that counts down from 10 to 0. This is very simple to do. All you need to do is change the text property of the text value with a custom value and include a delay of 1 second. Then add a callback for the next number with a delay of 1 second. Repeat this until you get to the number 0. There is no need to use variables to simulate a timer. If you are looking for someone to help you with your prototype, we are available for hire at: http://protonerds.com/

This one-screen prototype demonstrates some of Proto.io animation functionality.

This is an example of a Navigation Bar that disappears on any downward scroll and re-appears on on any upward scroll.