using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

using System.Windows.Forms;

namespace latihan_w6

{

    public partial class Form1 : Form

    {

        Button a = new Button();

        Button b = new Button();

        int n = 0;

        int m = 0;

        public Form1()

        {

            InitializeComponent();

        }

        private void Form1_Load(object sender, EventArgs e)

        {

            a.Text = "Ganti Warna";

            a.Location = new Point(12, 100);

            a.Enabled = true;

            this.Controls.Add(a);

            b.Text = "Hapus Button";

            b.Location = new Point(12, 200);

            b.Enabled = true;

            this.Controls.Add(a);

            this.Controls.Add(b);

            a.Click += a_Click;

            b.Click += b_Click;

        }

        private void a_Click(object sender, EventArgs e)

        {

            n = 0;

            b.BackColor = Color.Green;

            timer1.Enabled = true;

        }

        private void b_Click(object sender, EventArgs e)

        {

            m = 0;

            a.Visible = false;

            timer2.Enabled = true;

        }

        private void timer1_Tick(object sender, EventArgs e)

        {

            n++;

            if (n == 10)

            {

                b.BackColor = Color.White;

                timer1.Enabled = false;

            }         

        }

        private void timer2_Tick(object sender, EventArgs e)

        {

            m++;

            if (m == 10)

            {

                a.Visible = true;

                timer2.Enabled = false;

            }

        }

    }

}

​