en.javascript.info/6-async/02-promise-basics/03-animate-circle-promise/task.md

Animated circle with promise

Rewrite the showCircle function in the solution of the task info:task/animate-circle-callback so that it returns a promise instead of accepting a callback.

The new usage:

showCircle(150, 150, 100).then(div => {
  div.classList.add('message-ball');
  div.append("Hello, world!");
});

Take the solution of the task info:task/animate-circle-callback as the base.