Random r = new Random();
        private void injectTimer_Tick(object sender, EventArgs e)
        {
            if (r.Next(3) % 2 == 1)
                this.injectProgressBar.Step = (int)(r.NextDouble() * 4);

            this.injectProgressBar.PerformStep();

            if (this.injectProgressBar.Value >= this.injectProgressBar.Maximum)
            {
                this.injectTimer.Stop();
                this.injectButton.BackColor = Color.Green;
            }
        }