ditto filter on date

hello,

i wanted to ask a question about filtering.
i got my website online and i use ditto to get the articles i create.

this is my code until now.



so my articles descend on date.
what i want to do now is to filter some documents.

if i am on a document with the date of 21 may i want all the newer documents filtered away.
in that case the current document will be followed up by documents that are older than my current document.

this is what i want to achieve but i can’t achieve on my own.
i know that i have to filter on date but i don’t know how to put the exact code in my ditto call.

can you guys please help me i’m struggling with this for over 5 days and no one has responded to my calls.

Greetz,
davincio