TrafficLight.cs

using System;
using System.Net;
using System.Text;
using System.Windows.Forms;

namespace TrafficLight
{
    public partial class TrafficLight : Form
    {
        int _status = 0;
        const string token = "Your Discord Token Here";

        enum status
        {
            dnd = 0, idle = 1, online = 2
        }

        public TrafficLight()
        {
            InitializeComponent();
        }

        private void traffic_Tick(object sender, EventArgs e)
        {
            if (_status == 3) _status = 0;

            var req = (HttpWebRequest)WebRequest.Create("https://discordapp.com/api/v6/users/@me/settings");
            SetPacket(req);

            req.GetResponse().Close();
            _status++;
        }

        private void SetPacket(HttpWebRequest req)
        {
            req.Method = "PATCH";
            req.Accept = "*/*";
            req.UserAgent = "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) discord/0.0.301 Chrome/56.0.2924.87 Discord/1.6.15 Safari/537.36";
            req.ContentType = "application/json";

            req.Headers.Add("Authorization", token);
            req.KeepAlive = true;

            var str = "{\"status\":\"" + (status)_status + "\"}";
            var data = Encoding.UTF8.GetBytes(str);
            req.ContentLength = data.Length;

            var writer = req.GetRequestStream();

            writer.Write(data, 0, data.Length);
            writer.Close();
        }
    }
}