simple form application

 
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;
namespace WindowsFormsApplication1
{
public partial class Form1 : Form
{
 
private Random random;
public Form1()
{
InitializeComponent();
random = new Random();
 
 
}
private void goCmd_Click(object sender, EventArgs e)
{
this.colours();
}
private void colours()
{

while (true)
{
int number = random.Next();

if ((number == 0) || (number == 5) || (number == 9))
{
label1.BackColor = Color.Red;
label2.BackColor = Color.Blue;
label3.BackColor = Color.Yellow;
label4.BackColor = Color.Green;
label5.BackColor = Color.Chocolate;
label6.BackColor = Color.PaleGreen;
}
if ((number == 2) || (number == 6) || (number == 4))
{
label2.BackColor = Color.Red;
label3.BackColor = Color.Blue;
label4.BackColor = Color.Yellow;
label5.BackColor = Color.Green;
label6.BackColor = Color.Chocolate;
label1.BackColor = Color.PaleGreen;
}
else
{
label3.BackColor = Color.Red;
label4.BackColor = Color.Blue;
label5.BackColor = Color.Yellow;
label6.BackColor = Color.Green;
label1.BackColor = Color.Chocolate;
label2.BackColor = Color.PaleGreen;
}
}

} 

}
}