How to make a progress bar load in "bids"

Hello fellow C# programmers,

I am new to this language and trying having some fun in C# and I have stumpled upon a question now.

http://i.imgur.com/jwC3QLF.png

As you see in the picture above, I have a progress bar and a button called "Mix", what happends when I press the button is the progress bar will start to load fully up.

What I want is when I press the button once, it will load the first lets say 1/3 of the bar, when I press it the second time it will load 2/3 of the bar and last time it will finish up 3/3 of the bar, as shown in the picture below.

http://i.imgur.com/v2QhkOD.png

My code is pretty damn simple, a button, a timer and a progress bar

private void button1_Click(object sender, EventArgs e)
{
this.timer1.Start();
}

private void timer1_Tick(object sender, EventArgs e)
{
this.progressBar1.Increment(3);
}

Any help will be appreciated, but please talk in a language I can understand:P As I am new to C# as said^^

Best regards Henrik

Try this - set progressbar max to 99

        private void button1_Click(object sender, EventArgs e)
        {
            if (progressBar1.Value==99)
            {
                progressBar1.Value = 0;
            }
            timer1.Start();
            button1.Enabled = false;
        }

        private void timer1_Tick(object sender, EventArgs e)
        {
            incrementBar();
        }

        public void incrementBar()
        {
            progressBar1.Value += 1;
            switch (progressBar1.Value)
            {
                case 33:
                    timer1.Stop();
                    button1.Enabled = true;
                    break;
                case 66:
                    timer1.Stop();
                    button1.Enabled = true;
                    break;
                case 99:
                    timer1.Stop();
                    button1.Enabled = true;
                    break;
            }
        }