I need help. I want to make my bot send a message to all channels in a .txt file every 6 hours but not just all messages at the same time. Betweem every message should be a 4-5 seconds cooldown. here is what I got to work:

const { Client } = require('discord.js');
const client = new Client({intents: []})
const config = require("./config.json");
const fs = require('fs'); //fs reads text files :DD
var text = fs.readFileSync('./text.txt', {"encoding": "utf-8"})

function loop() { //loop start
    var sixhours = Math.floor(Math.random() * 3800000) + 21600000; //generate the random 6 hour wait
    setTimeout(function(){  //wait 6 hours to send text to server
        console.log(`Waited with time: ${sixhours}`) 
     console.log('Start sending to server.')
     //Server1
     var message_cooldown = Math.floor(Math.random() * 5000) + 3000; //generate the cooldown

     setTimeout(function(){
         client.channels.cache.get('567823454237345').send(text)
         console.log('Done with Server1.')
     }, message_cooldown);
    // Server2
     setTimeout(function(){
        client.channels.cache.get('5678356424363456').send(text)
        console.log('Done with Server2.')
    }, message_cooldown);

             //done
                loop();
            }, sixhours);
        }
        loop(); //loop end




client.login(config.token);

These two channels aren't the only ones, so is there a way to get all channel ids from a file and do the same process? It would take really long to paste every single id with code in there. With the shorter version you also have the possibility to add channel ids via command.