class Program
{
    int frequency, increment;

    public void BrainPadSetup()
    {
        frequency = 0; increment = 0;
    }

    public void BrainPadLoop()
    {
        if (BrainPad.Button.IsUpPressed())
        {
            increment = 100;
        }
        if (BrainPad.Button.IsDownPressed())
        {
            increment = -100;
        }
        if (increment != 0)
        {
            frequency = frequency + increment;
            increment = 0;
            BrainPad.Buzzer.PlayFrequency(frequency);
            BrainPad.WriteDebugMessage(frequency);
            BrainPad.Wait.Seconds(0.2);
            BrainPad.Buzzer.Stop();
        }
    }
}