Fast Colored TextBox for Syntax Highlighting

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using FastColoredTextBoxNS;

namespace Tester
{
    public partial class JokeSample : Form
    {
        public JokeSample()
        {
            InitializeComponent();
            fctb.DefaultStyle = new JokeStyle();
        }

        private void timer1_Tick(object sender, EventArgs e)
        {
            fctb.Invalidate();
        }
    }

    /// <summary>
    /// This class is used as text renderer
    /// </summary>
    class JokeStyle : TextStyle
    {
        public JokeStyle():base(null, null, FontStyle.Regular)
        {
        }

        public override void Draw(Graphics gr, Point position, Range range)
        {
            foreach (Place p in range)
            {
                int time = (int)(DateTime.Now.TimeOfDay.TotalMilliseconds/2);
                int angle = (int)(time % 360L);
                int angle2 = (int)((time - (p.iChar - range.Start.iChar)*20) % 360L)*2;
                int x =  position.X + (p.iChar - range.Start.iChar) * range.tb.CharWidth;
                Range r = range.tb.GetRange(p, new Place(p.iChar+1, p.iLine));
                Point point = new Point(x, position.Y + (int)(5 + 5 * Math.Sin(Math.PI * angle2 / 180)));
                gr.ResetTransform();
                gr.TranslateTransform(point.X + range.tb.CharWidth / 2, point.Y +range.tb.CharHeight / 2);
                gr.RotateTransform(angle);
                gr.ScaleTransform(0.8f, 0.8f);
                gr.TranslateTransform(- range.tb.CharWidth / 2, -range.tb.CharHeight / 2);
                base.Draw(gr, new Point(0, 0), r);
            }
            gr.ResetTransform();
        }
    }
}