I made this illusion based on the Tusi motion method, which takes his name from Nair al-Din Tusi, a Persian astronomer from the 13th century. The principle established by Tusi states that: If a circle with diameter A rotates on the inner boundary of a circle with diameter 2A, then a point on the circumference of the inner circle traces a straight line. As you can see, any ball in the inner circumference is following a perfect linear movement. This is created with 8 Containers where the balls move linear in a loop. The delay between balls must be always the same as the speed of the animation. An ease-in-out cubic-bezier(.4, 0, .6, 1) animation is required to get the circular shape.

Coronavirus COVID-19 Global Cases by Johns Hopkins CSSE - Desktop Version Using an embed map from https://www.arcgis.com/

An example of a date picker that can be imported and used in your project. (Basic use of variables) tags: calendar, picker, date picker

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.

Interactive banner with video of Google TV's home page. Must click to enable key presses used on a TV focus interaction model. The menu can be navigated but is only actionable for "For You" on the home page. Switching focus to the banner will enable additional UI and pausing on left/right interactions will allow for video playback with sound. No interactions below the banner are actionable.

Random Graphs created by using variables.

An animation of our Solar System

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

Design Credits: https://www.sketchappsources.com/free-source/4675-marier-shopping-ui-kit-ebizmirli-sketch-freebie-resource.html