private void btnNew_Click(object sender, EventArgs e)
        {
            //create new number of nights form
            frmNumberNightsPrompt prompt = new frmNumberNightsPrompt();

            //hide this form
            this.Visible = false;

            //display that form
            prompt.Show();
        }
        private void newShow()
        {
            //prompt for changes
            changes();

            //set to night 1
            updateNight(1);

            //create prompt for new show
            frmNumberNightsPrompt newNumNights = new frmNumberNightsPrompt(this);

            //disalbe this form
            this.Enabled = false;

            //display new prompt
            newNumNights.Show();
        }