chochenlu

namespace WindowsFormsApplication1
{
public partial class Form1 : Form
{
int c = 0, d;
public Form1()
{
InitializeComponent();
}

private void button1_Click(object sender, EventArgs e)
{

c = c + 1;
button1.Text = c.ToString();
}

private void timer1_Tick(object sender, EventArgs e)
{
c = c + 1;
d = c % 10;
if (d <= 3)
{
button1.BackColor = System.Drawing.Color.FromName("Red");
button2.BackColor = System.Drawing.Color.FromName("Black");
button3.BackColor = System.Drawing.Color.FromName("Black");
}
else if (d > 3 && d <= 5)
{
button1.BackColor = System.Drawing.Color.FromName("Black");
button2.BackColor = System.Drawing.Color.FromName("Yellow");
button3.BackColor = System.Drawing.Color.FromName("Black");
}
else if (d > 5)
{
button1.BackColor = System.Drawing.Color.FromName("Black");
button2.BackColor = System.Drawing.Color.FromName("Black");
button3.BackColor = System.Drawing.Color.FromName("Green");
}
else { }
button1.Text = d.ToString();
button2.Text = d.ToString();
button3.Text = d.ToString();
}

private void button2_Click(object sender, EventArgs e)
{

}

private void button3_Click(object sender, EventArgs e)
{

}

private void pictureBox1_Click(object sender, EventArgs e)
{

}
}
}

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