It always makes me sad seeing a cool animation on Dribbble with comments like:
• "do you think this can be done by software developers?"
• "I just wanna hear what your developers say about you"
• "devs yeah they must be hahaha scratching heads"
• "Dude you know that all the developers are going to hate you for posting this?"
So I just wanted to show that @Jakub Antalík's great concept can be easily implemented. I get that this is only a rough estimate, but that was the point. I did this with less than 20 lines of code in less than 20 minutes. That includes calculating rough bezier curves, coding, recording the iOS Simulator and making a gif out of it.
Demo project is available on GitHub.