@mallory_cormier 
To stop a message loop in Discord.js, you can use clearInterval() method. Here is an example of how to stop a message loop:
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const Discord = require('discord.js');
const client = new Discord.Client();
let interval;
client.on('message', message => {
    if (message.content === '!startloop') {
        interval = setInterval(() => {
            message.channel.send('This is a loop message.');
        }, 5000); // Sends a message every 5 seconds
    }
    if (message.content === '!stoploop') {
        clearInterval(interval);
    }
});
client.login('your-bot-token');
 | 
In this example, when you send !startloop command in the Discord server channel where the bot is running, it will start sending a message every 5 seconds. To stop the message loop, you just need to send !stoploop command. The clearInterval() method will stop the interval and the message loop.