Google map. How to draw a road using markers?

Question

Google

Have a nice day everyone. Faced such a problem. There are a bunch of markers for coordinates. We need to pave the way for them. But Google Maps refuses to do so. Actually here is the fiddle ( jsfiddle.net/8uupL0b3/). It's pretty obvious on it. I can not force the map to be drawn by markers.
As it turned out, Google allows you to draw lines only if there are 23 markers (and then only if you use API_KEY) and there are 8 of them in general.
Therefore, in the code I break it (an array of markers) into pieces.
If anyone has come across something like this please let me know. Thank you.

Answer 1

It can assemble a full-fledged GPX from points and show it, for example, as gpsvisualizer.com does