How to write a formula in php?

Question

PHP

I need to display blocks of code in a WordPress loop.
There are two blocks in one row.
It looks like this:

<div class="wrap">
 <div class="block"></div>
 <div class="block"></div>
</div>

I took this approach

<?php if ( $i === 1 || $i % 3 === 0 ): ?>
                            <div class="wrap">
                                <?php endif ?>

                                   <div class="block"></div>
                                   <div class="block"></div>

<?php if ( $i === 2 || $i % 2 === 0 ): ?>
                            </div>
                            <?php endif ?>

Only this code works for blocks 1 and 3.
And you need for 1, 3, 5, 7, 9.
I hope I explained correctly.
Thanks in advance.

Answer 1

https://ideone.com/qa8wF4
if I understand correctly what it is all about.