How to dynamically change the radius of a circle on Yandex maps?

Question

JavaScript

Good afternoon!
I solve the problem of dynamically changing the diameter of a circle on Yandex maps, and something doesn’t work))
Yandex maps are not strong in API. but you need to put an image on the edge of the circle and when you drag this image, the radius of the circle also changes, I found the implementation on this site mapexpert.pro/maparea/index-0.1.5.html but it works on API 2.0 and on 2.1. refuses.
Can anyone advise how to add an image or a solution to the problem as a whole?)
Thank you.