int button;
int button2;
void setup() {
   Serial.begin(9600);
   pinMode(8, INPUT_PULLUP);
   pinMode(7, INPUT_PULLUP);
   pinMode(13, OUTPUT);
   pinMode(12, OUTPUT);
   pinMode(11, OUTPUT);
}
void loop() {
button=digitalRead(8);
button2=digitalRead(7);
Serial.println(button);
if ((button == 0) && (button2 == 0))
  {
  digitalWrite(13, HIGH);
  digitalWrite(12, LOW);
  digitalWrite(11, LOW);
  delay(1000);
  digitalWrite(13, LOW);
  digitalWrite(12, HIGH);
  digitalWrite(11, LOW);
  delay(1000);
  digitalWrite(13, LOW);
  digitalWrite(12, LOW);
  digitalWrite(11, HIGH);
  delay(1000);
  }
  else if (button == 0)
{
  digitalWrite(11, LOW);
  digitalWrite(12, LOW);
  digitalWrite(13, HIGH);
  delay(1000);
  digitalWrite(11, LOW);
  digitalWrite(12, HIGH);
  digitalWrite(13, LOW);
  delay(1000);
  digitalWrite(12, LOW);
}
  else if (button2 == 0)
{
  digitalWrite(13, LOW);
  digitalWrite(12, HIGH);
  digitalWrite(11, LOW);
  delay(1000);
  digitalWrite(13, LOW);
  digitalWrite(12, LOW);
  digitalWrite(11, HIGH);
  delay(1000);
  digitalWrite(11, LOW);
}
else
{}
delay(1000);
}