How in modx after every third publication through pdoResources to insert a certain html-code (separator) on the page?

Question

MODX

How in modx after every third publication through pdoResources to insert a certain html-code (separator) on the page?
This is how it looks like, for example:

[[pdoResources?
    &parents=`5`
    &depth=`1`
    &tpl=`statii`
    &includeTVs=`image`
]]

Answer 1

In the statii chunk, define an entry that is a multiple of 3 using the idx placeholder value:

Запись после каждого третьего элемента потока

Answer 2

Element designs are possible in the standard delivery
. First
Last
Even
Odd

Answer 3

The old-fashioned bydlokodom through js)

Answer 4

[[!divThree? &input=`[[+idx]]` ÷=`3`]]