How, when you click on the buttons, build routes from point A to point B on the Yandex map?

Question

Yandex

There is a place on the map, let's say VDNKh. It is necessary to build walking routes to this place by clicking on the desired button (buttons below):
Route from Red Square to VDNKh
Route from the Hermitage to VDNKh
Map code https://codepen.io/anon/pen/OoYVRe
Is there any way to do this?