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.

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Archivo personal de ChV

The project includes 1. snap horizontal scrollable container (screen 2) 2. button enabled when text field is filled (screen 5) 3. Sign in validation using code (screen 7) Credits to https://www.sketchappsources.com/contributor/pirogovoe for the design!!