window form control library

Question

Hi I have a question .i want make trafic light user control in C# and i have design lights.

but i need to have a state property in window property editor which when change to red red color b painted in my elipse for trafic control light and when green  red will b again grey and blue will filled in elips.

i have already made control but dnt know how to handel lights with a state in propery

this is the paint method code for trafic light but i want to set a state property which havr three different states as i explained above. 

 private void UserControl1_Paint(object sender, PaintEventArgs e)

        {

            Graphics g = CreateGraphics();

            Pen p = new Pen(Color.White, 3);

           

            Rectangle r = new Rectangle();

            r.Height = 150;

            r.Width = 55;

            

            SolidBrush b = new SolidBrush(Color.Black);

            g.FillRectangle(b, r);

            SolidBrush br = new SolidBrush(Color.Gray);

            Rectangle rect = new Rectangle(9, 7, 40, 40);

            Rectangle re = new Rectangle(9, 50, 40, 40);

            Rectangle rec = new Rectangle(9, 95, 40, 40);

            // g.DrawEllipse(p, rect);

            g.FillEllipse(br, rect);

            g.FillEllipse(br, re);

            g.FillEllipse(br, rec);

        

        }

thanks in advance

Tauqeer