unsigned char RED_LED = 23;

unsigned char YELLOW_LED = 19;

unsigned char GREEN_LED = 18;

char pb_green = 27;
char pb_blue = 25;

void setup() {
  pinMode(RED_LED, OUTPUT);
  pinMode(YELLOW_LED, OUTPUT);
  pinMode(GREEN_LED, OUTPUT);

  pinMode(pb_green, INPUT);
  pinMode(pb_blue, INPUT);

  Serial.begin(115200);
}

void loop() {

  //Serial.print("LEDs On");
  // if i press the blue push button, red LED will be on.
  // esle off the red LED
  char val_pb_blue = digitalRead(pb_blue);
  //char val_pb_green = digitalRead(pb_green);

  Serial.print("PB Blue = "); Serial.println(val_pb_blue, DEC);
  if (val_pb_blue == 0)
  {
    digitalWrite(RED_LED, HIGH);
    //digitalWrite(YELLOW_LED, HIGH);
  }
  else
  {
    digitalWrite(RED_LED, LOW);
    //digitalWrite(YELLOW_LED, LOW);
  }


}