How to draw a deleted line in SVG?

Question

JavaScript

Good afternoon everyone, there is such a code:
https://jsfiddle.net/Kosta_09/53o7ganv/
Tell me, please, if, well, let's create three or four lines and delete the second, then how in that freed gap (after deleting the second line) is it possible to draw two more lines with reference to the coordinates of the end and beginning of neighboring lines, that is, so that the curve is continuous? Thank you.