#define D2_RED_CAR     PD2
#define D3_YELLOW_CAR  PD3
#define D4_GREEN_CAR   PD4
#define BUTTON         PD5

#define D8_RED_BIKE      PB0
#define D9_YELLOW_BIKE   PB1
#define D10_GREEN_BIKE   PB2

#define BUTTON_PRESSED (PIND & (1 << BUTTON)) 

void setup() {
  // put your setup code here, to run once:
  DDRD = 0b00111000;	// Pin 0 - 7
  DDRB = 0b11100000;	// Pin 8-13
  // PULL-UP RESISTOR FOR BUTTON
  //PORTD |= 0b00000100;
}

void block_traffic(void){
	// STARTS AS GREEN
	// TURN OFF GREEN
	// TURN ON YELLOW
	// WAIT 3 SEC
	// TURN OFF YELLOW
	// TURN ON RED
	// WAITS UNTIL OTHER UNIT SENDS SIGNAL CLEAR
}

void allow_traffic(void){
	// STARTS AS RED
	// TURN ON YELLOW
	// WAIT 3 SEC
	// TURN OFF YELLOW
	// TURN ON GREEN
	// WAIT UNTIL OTHER UNIT SENDS SIGNAL BLOCK
}

void loop() {
  // put your main code here, to run repeatedly:
  //PORTB |= 0b11111111;
  //PORTD |= 0b11111111;
  while(1){
		if(BUTTON_PRESSED) {
			PORTD |= (1 << D2_RED_CAR);
			
		}else{
			PORTD &= (0 << D2_RED_CAR);
		}
  }
}