Часы идут наоборт!

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Drawing.Drawing2D;
using System.Runtime.InteropServices;

namespace clock
{
    public class Form1 : System.Windows.Forms.Form
    {
       
        #region ZvukFlag
        [Flags]
            public enum SoundFlags : int
        {
            SND_SYNC = 0x0000,    
            SND_ASYNC = 0x0001,
            SND_NODEFAULT = 0x0002,
            SND_MEMORY = 0x0004,
            SND_LOOP = 0x0008,    
            SND_NOSTOP = 0x0010,
            SND_PURGE = 0x40,
            SND_NOWAIT = 0x00002000,
            SND_ALIAS = 0x00010000,
            SND_ALIAS_ID = 0x00110000,
            SND_FILENAME = 0x00020000,
            SND_RESOURCE = 0x00040004
        }

        #endregion

        #region Zvuk(winmm.dll)
        [DllImport("winmm.dll", SetLastError=true)]
        static extern bool PlaySound(string pszSound,
            System.UIntPtr hmod, uint fdwSound);
        public static void Play (string strFileName)
        {
            PlaySound (strFileName, UIntPtr.Zero, (uint)(SoundFlags.SND_FILENAME | SoundFlags.SND_ASYNC));
        }
        #endregion

        #region Elonlar
        Graphics graphic;
        Pen penH= new Pen(Color.Black,3.0f);
        Pen penM= new Pen(Color.Blue,2.0f);
        Pen penS= new Pen(Color.MediumSlateBlue);
        int H, M, S;
        double ugolH,ugolM,ugolS;
        double gr6=0.314/3;
        int rs=80,centerX=150,centerY=150;
        int XS,YS,XM,YM,XH,YH;
        private System.Windows.Forms.Timer timer1;
        private System.ComponentModel.IContainer components;
        #endregion

        public Form1()
        {
            InitializeComponent();
        }

        protected override void Dispose( bool disposing )
        {
            if( disposing )
            {
                if (components != null)
                {
                    components.Dispose();
                }
            }
            base.Dispose( disposing );
        }

        #region Windows Form Designer generated code
        /// <summary>
        /// Required method for Designer support - do not modify
        /// the contents of this method with the code editor.
        /// </summary>
        private void InitializeComponent()
        {
            this.components = new System.ComponentModel.Container();
            this.timer1 = new System.Windows.Forms.Timer(this.components);
            //
            // timer1
            //
            this.timer1.Enabled = true;
            this.timer1.Interval = 1000;
            this.timer1.Tick += new System.EventHandler(this.timer1_Tick);
            //
            // Form1
            //
            this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
            this.ClientSize = new System.Drawing.Size(292, 266);
            this.Name = "Form1";
            this.Text = "Form1";
            this.Load += new System.EventHandler(this.Form1_Load);
        }
        #endregion

        /// <summary>
        /// The main entry point for the application.
        /// </summary>
        [STAThread]
        static void Main()
        {
            Application.Run(new Form1());
        }

        private void Form1_Load(object sender, System.EventArgs e)
        {
            graphic=this.CreateGraphics();
        }

        private void timer1_Tick(object sender, System.EventArgs e)
        {
            UIntPtr ip = UIntPtr.Zero;
            bool result = PlaySound(@"C:\Windows\Media\start.wav",ip,0);
           
            this.Refresh();
            H=DateTime.Now.Hour-3;
            M=DateTime.Now.Minute-15;
            S=DateTime.Now.Second-15;
           
            if(H<6) ugolH=5*(3-H)*gr6;
            else ugolH=5*(15-H)*gr6;
            if(M<30) ugolM=(15-M)*gr6;
            else ugolM=(75-M)*gr6;
            if(S<30) ugolS=(15-S)*gr6;
            else ugolS=(75-S)*gr6;
            XS=Convert.ToInt32(centerX+rs*Math.Sin(ugolS));
            YS=Convert.ToInt32(centerY+rs*Math.Cos(ugolS));
            XM=Convert.ToInt32(centerX+rs*Math.Sin(ugolM));
            YM=Convert.ToInt32(centerY+rs*Math.Cos(ugolM));
            XH=Convert.ToInt32(centerX+rs*Math.Sin(ugolH));
            YH=Convert.ToInt32(centerY+rs*Math.Cos(ugolH));
            graphic.DrawLine(penH,centerX,centerY,XH,YH);
            graphic.DrawLine(penM,centerX,centerY,XM,YM);
            graphic.DrawLine(penS,centerX,centerY,XS,YS);
        }
    }
}