Timer and buttons

Question

hellow, someone has given me this: private void btnPush_Click(object sender, System.EventArgs e) { count++; if(count == 4) count = 1; switch(count) { case 1: txtBox.Text = "a"; break; case 2: txtBox.Text = "b"; break; case 3: txtBox.Text = "c"; break; } } this works, but the problem is that i need to get more a of b next to each other. How can ik do this? no he just change the a into a be but i can't at an other one? thx and greetz