discord.js/docs/examples/embed.js

/**
 * An example of how you can send embeds
 */

// Extract the required classes from the discord.js module
const { Client, RichEmbed } = require('discord.js');

// Create an instance of a Discord client
const client = new Client();

/**
 * The ready event is vital, it means that only _after_ this will your bot start reacting to information
 * received from Discord
 */
client.on('ready', () => {
  console.log('I am ready!');
});

client.on('message', message => {
  // If the message is "how to embed"
  if (message.content === 'how to embed') {
    // We can create embeds using the MessageEmbed constructor
    // Read more about all that you can do with the constructor
    // over at https://discord.js.org/#/docs/main/stable/class/RichEmbed
    const embed = new RichEmbed()
      // Set the title of the field
      .setTitle('A slick little embed')
      // Set the color of the embed
      .setColor(0xFF0000)
      // Set the main content of the embed
      .setDescription('Hello, this is a slick embed!');
    // Send the embed to the same channel as the message
    message.channel.send(embed);
  }
});

// Log our bot in using the token from https://discordapp.com/developers/applications/me
client.login('your token here');