How can I modify the codes so that every two slot with same number will add 10 coins, 30 coins for three and 100 coins for 7 7 7.

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 Lucky_Seven
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void label1_Click(object sender, EventArgs e)
        {

        }

        private void timer1_Tick(object sender, EventArgs e)
        {
            Random rnd = new Random();
            lblSlot1.Text = Convert.ToString(rnd.Next(1, 8));

            Color randomColor = Color.FromArgb(rnd.Next(256), rnd.Next(256), rnd.Next(256));
            lblSlot1.ForeColor = randomColor;
        }

        private void timer2_Tick(object sender, EventArgs e)
        {
            Random rnd = new Random();
            lblSlot2.Text = Convert.ToString(rnd.Next(1, 8));

            Color randomColor = Color.FromArgb(rnd.Next(256), rnd.Next(256), rnd.Next(256));
            lblSlot2.ForeColor = randomColor;
        }

        private void timer3_Tick(object sender, EventArgs e)
        {
            Random rnd = new Random();
            lblSlot3.Text = Convert.ToString(rnd.Next(1, 8));

            Color randomColor = Color.FromArgb(rnd.Next(256), rnd.Next(256), rnd.Next(256));
            lblSlot3.ForeColor = randomColor;
        }

        private void cmdPlay_Click(object sender, EventArgs e)
        {
            timer1.Enabled = true;
            timer2.Enabled = true;
            timer3.Enabled = true;
            cmdPlay.Enabled = false;
            cmdStop.Enabled = true;

        }

        private void cmdStop_Click(object sender, EventArgs e)
        {
            timer1.Enabled = false;
            timer2.Enabled = false;
            timer3.Enabled = false;
            cmdPlay.Enabled = true;
            cmdStop.Enabled = false;

            if (lblSlot1.Text == lblSlot2.Text)
            {
                int coins;
                coins = Convert.ToInt16(lblCoins.Text) + 10;
                lblCoins.Text = Convert.ToString(coins);
            }
            
            
        }

        private void cmdQuit_Click(object sender, EventArgs e)
        {
            DialogResult dr = MessageBox.Show("Are you sure you want to quit?", "Lucky Seven", MessageBoxButtons.YesNo);
            switch (dr)
            {
                case DialogResult.Yes:
                    Application.Exit();
                    break;
                case DialogResult.No:
                    MessageBox.Show("Quitting applicationjcanceled","LuckySeven");
                    break;

        }
    }
    }
}