How would go about making a script for iMacros for this website? (

I'm trying to like, or "yeah" every post on this page,

Https://indifo.cafe

It's like Miiverse, and I wanted to Yeah every post by spamming, but how would I go about writing the script for iMacros?

I know for Miiverse, it was this script you had to put:

-----
URL GOTO=https://miiverse.nintendo.net/titles/14866558072985245728/14866558073038702637
WAIT SECONDS=1
URL GOTO=javascript:$('.empathy-button:not(.empathy-added)').click();
WAIT SECONDS=1
-----

I know I have to change the URL to "URL GOTO=https://indigo.cafe/communities/1"
I keep this: "WAIT SECONDS=1"

But I'm not sure how yeahs are implemented in this website.
Can anyone help with whats the javascript code I'd put in if I wanted to make a Yeahbot?