How to wrap each block into a group?

Question

JavaScript

I have several blocks of type rect rendered to the screen with a loop:
JSFIDDLE
But I would like each of these blocks to be wrapped in a g container like this:

<g>
<rect></rect>
</g>

Here is my attempt:
JSFIDDLE
But it fails, please help me to fix the code

Answer 1

So ?