const int RED_BTN_PIN = 11;
const int GRN_BTN_PIN = 10;
const int RED_LED_PIN =  9;
const int GRN_LED_PIN =  8;

void setup() {
  Serial.begin(115200);
  pinMode(RED_BTN_PIN, INPUT_PULLUP);
  pinMode(GRN_BTN_PIN, INPUT_PULLUP);
  pinMode(RED_LED_PIN, OUTPUT);
  pinMode(GRN_LED_PIN, OUTPUT);
}

void loop() {
  if (digitalRead(RED_BTN_PIN) == LOW || digitalRead(GRN_BTN_PIN) == LOW) {
    digitalWrite(RED_LED_PIN, HIGH);
  } else  {
    digitalWrite(RED_LED_PIN, LOW);
  }
  if (digitalRead(GRN_BTN_PIN) == LOW) {
    digitalWrite(GRN_LED_PIN, HIGH);
  } else  {
    digitalWrite(GRN_LED_PIN, LOW);
  }
}