football score generator

Random r = new Random();
        private void button11_Click(object sender, EventArgs e)
        {
            int agg;
            int h1, h2, a1, a2;
            textBox1.Clear();
            for (int i = 1; i <= 20; i++) //48-40-20-20
            {
                do
                {
                    agg = r.Next(0, 3);
                    h1 = agg == 0 ? r.Next(0, 5) : r.Next(0, 9);
                    h2 = agg == 0 ? r.Next(0, 5) : r.Next(0, 9);
                    a1 = agg == 0 ? h1 : r.Next(0, 9);
                    a2 = agg == 0 ? h2 : r.Next(0, 9);
                } while (agg == 0 ? (h1 + a2) == (h2 + a1) : (agg == 1 ? (h1 + a2) >= (h2 + a1) : (h1 + a2) <= (h2 + a1)));
                textBox1.Text += $"{i}. " + (agg == 1 && (h1 + a2) == (h2 + a1) ? $"{h1}:{a1}, {h2}:{a1}H" : (agg == 2 && (h1 + a2) == (h2 + a1) ? $"{h1}:{a1}, {h2}:{a1}A" : $"{h1}:{a1}, {h2}:{a1}")) + Environment.NewLine;
            }
        }