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#Extreamley rough and laggy clock #

I purposley made the timer interval less than a second in hopes for making things run smoothley but it even worsened the situation! I thought of making the second's hand run on milliseconds but it still didn't do the job and there was difference between the clock and the label text.

public Form1()
 {
 InitializeComponent();
 timer1.Interval = 500;
 timer1.Start();
 }
 private void timer1_Tick(object sender, EventArgs e)
 {
 this.Invalidate();
 this.label1.Text = String.Format("{0}:{1}:{2}",clockTime.Hour,clockTime.Minute,clockTime.Second);
 
 }
 DateTime clockTime = DateTime.Now; 
 int cirDia = 200;
 public void Form1_Paint(object sender, PaintEventArgs e)
 {
 clockTime = DateTime.Now;
 Pen secHand = new Pen(Color.Green, 1);
 Pen minHand = new Pen(Color.Black, 2);
 Pen hourHand = new Pen(Color.Red, 3);
 Graphics canvas = e.Graphics;
 float centerX = this.ClientRectangle.Width / 2;
 float centerY = this.ClientRectangle.Height / 2;
 canvas.DrawEllipse(Pens.Aqua, centerX - cirDia / 2, centerY - cirDia / 2, cirDia, cirDia);
 float secX = 100 * (float)Math.Cos(Math.PI / -2 + (2 * clockTime.Second * Math.PI) / 60) + centerX;
 float secY = 100 * (float)Math.Sin(Math.PI / -2 + (2 * clockTime.Second * Math.PI) / 60) + centerY;
 float minX = 80 * (float)Math.Cos(Math.PI / -2 + (2 * clockTime.Minute * Math.PI) / 60) + centerX;
 float minY = 80 * (float)Math.Sin(Math.PI / -2 + (2 * clockTime.Minute * Math.PI) / 60) + centerY;
 float hourX = 70 * (float)Math.Cos(Math.PI / -2 + (2 * clockTime.Hour * Math.PI) / 12) + centerX;
 float hourY = 70 * (float)Math.Sin(Math.PI / -2 + (2 * clockTime.Hour * Math.PI) / 12) + centerY;
 canvas.DrawLine(secHand, centerX, centerY, secX, secY);
 canvas.DrawLine(minHand, centerX, centerY, minX, minY);
 canvas.DrawLine(hourHand, centerX, centerY, hourX, hourY);
 }