https://codepen.io/kagannikita/pen/rNmOyza?editors=1111 можете проверит правильность таска как по мне тут надо промисы добавить periodOutput(period) method should output in the console once per every period how much time left from the function first call. Example: periodOutput(100) -> 100(after 100 ms), 200(after 100 ms), 300(after 100 ms), ...
extendedPeriodOutput(period) method should output in the console once per period how much time left from the function first call and increase the period. Example: // extendedPeriodOutput(100) -> 100(after 100 ms), 200(after 200 ms), 300(after 300 ms)