FullBot01.js

//Require Discord.js
const Discord = require('discord.js')

//Create a new bot Account
const bot = new Discord.Client()

//Bot token
const token = 'Your bot token here'

//Logging in with the bot Account
bot.login(token)

//When the bot is read, send a message to the console saying the bot is ready
bot.on('ready', () => {
  console.log('Bot is ready!')
})

//Whenever the bot detects a new message, this code will be ran
bot.on('message', (message) => {

  //Check if the content of the incoming message is equal to 'ping'
  if (message.content == 'ping') {

    //Send a message with the content of 'Pong!'
    message.channel.sendMessage('Pong!')
  }
})