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);
  Serial.print("PB Green = "); Serial.println(val_pb_green, DEC);
  
  if( (val_pb_blue == 0) && (val_pb_green == 0) ) 
  {
    digitalWrite(RED_LED, HIGH);
    digitalWrite(GREEN_LED, HIGH);
  }

  else if ( (val_pb_blue == 1) && (val_pb_green == 0) )
  {
    digitalWrite(RED_LED, LOW);
    digitalWrite(GREEN_LED, HIGH);
  }

  else if ( (val_pb_blue == 0) && (val_pb_green == 1) )
  {
    digitalWrite(RED_LED, HIGH);
    digitalWrite(GREEN_LED, LOW);
  }
  else if ( (val_pb_blue == 1) && (val_pb_green == 1) )
  { digitalWrite(RED_LED, LOW);
    digitalWrite(GREEN_LED, LOW);
  } 

 



}