First Discord Bot

// Calling the package
var Discord = require('discord.js');
var bot = new Discord.Client();

// Listener Event: Message Received ( This will run every time a message is received )
bot.on('message', message => {

  // Variables
  var sender = message.author; // The person who sent the message.
  var msg = message.content.toLowerCase(); // Takes the message, and makes it all lowercase.
  var prefix = '>' // The prefix of the bot, you can set this to what ever you want.

  // Greetings messages
  if (msg === prefix + 'vep') {
      message.channel.send('Welcome to Relax server') // Sends a message to the channel, with the contents: "sksksk welcome to R E L A X"
  }


  // More Greeting Messages
  if (msg === prefix + 'reto') {
      message.channel.send('We hope you have fun here sksksk')

  }


  // More Greeting messages
  if (msg === prefix + 'tee') {
      message.channel.send('Everyone is welcomed here')

  }

  // Deleting Specific Messages ( Messages that are not an ID for me )
  if (message.channel.id === '613805872396763249') { // Checks if the message is in the specific channel
      if (isNaN(message.content)) { // Checks if the message is not a number, if it's not the following code will run
          message.delete() // This deletes the message
          message.author.send('Only post numbers in <#613805872396763249> channel please. Thank you!') // This private messages the author that what they posted was invalid.
        }
  }
})

// Listener Event: Bot Launched
bot.on('ready', () => {
  console.log('Bot Launched...') // Runs when the bot is Launched

  // You can put any code you want here, it will run when your turn on your bot.

});

// Login
bot.login('NjEzODIxNjg0NDc0MDUyNjY1.XV2gGQ.v2IoiDUlLErob-udjefIOPm4kjI') // Don't let people see this code, people can control yor bot, including the servers your bot has admin in.