var Discord = require("discord.js");
var bot = new Discord.Client();

bot.on("message", msg => {
    if (msg.content.startsWith("ping")) {
        msg.channel.sendMessage("pong!");
    }
});

bot.on("message", msg => {
    if (msg.content.startsWith("!startcleaning")) {
                var interval = setInterval (function (){
                                msg.channel.sendMessage("!clear 100");
                },900000);
    }
});

bot.on('ready', () => {
  console.log('I am ready!');
});