// Road LED lights defined
#define r1_red 13
#define r1_yellow 12
#define r1_green 11

#define r2_red 10
#define r2_yellow 9
#define r2_green 8

#define r3_red 7
#define r3_yellow 6
#define r3_green 5

#define r4_red 4
#define r4_yellow 3
#define r4_green 2

// Road sensors defined
#define r1_sensor_front 22 //top-side
#define r1_sensor_back 24 //bottom-side

#define r2_sensor_front 23 //top-side
#define r2_sensor_back 25 //bottom-side

#define r3_sensor_front 34 //top-side
#define r3_sensor_back 36 //bottom-side

#define r4_sensor_front 37 //top-side
#define r4_sensor_back 35 //bottom-side

// Set Sensors for other roads also


void setup() {
  // put your setup code here, to run once:

  Serial.begin(9600);

  // LED Lights
  pinMode(r1_red, OUTPUT);
  pinMode(r1_yellow, OUTPUT);
  pinMode(r1_green, OUTPUT);

  pinMode(r2_red, OUTPUT);
  pinMode(r2_yellow, OUTPUT);
  pinMode(r2_green, OUTPUT);

  pinMode(r3_red, OUTPUT);
  pinMode(r3_yellow, OUTPUT);
  pinMode(r3_green, OUTPUT);

  pinMode(r4_red, OUTPUT);
  pinMode(r4_yellow, OUTPUT);
  pinMode(r4_green, OUTPUT);


  // sensors
  pinMode(r1_sensor_front, INPUT);
  pinMode(r1_sensor_back, INPUT);

  pinMode(r2_sensor_front, INPUT);
  pinMode(r2_sensor_back, INPUT);

  pinMode(r3_sensor_front, INPUT);
  pinMode(r3_sensor_back, INPUT);

  pinMode(r4_sensor_front, INPUT);
  pinMode(r4_sensor_back, INPUT);


  
}



void loop() {
  // put your main code here, to run repeatedly:
  digitalWrite(r1_red, LOW);
  digitalWrite(r1_yellow, LOW);
  digitalWrite(r1_green, HIGH);

  digitalWrite(r2_red, LOW);
  digitalWrite(r2_yellow, HIGH);
  digitalWrite(r2_green, LOW);

  
  digitalWrite(r3_red, LOW);
  digitalWrite(r3_yellow, HIGH);
  digitalWrite(r3_green, HIGH);

  
  digitalWrite(r4_red, HIGH);
  digitalWrite(r4_yellow, LOW);
  digitalWrite(r4_green, LOW);

  int a = digitalRead(r1_sensor_front);
  Serial.println(a);

  

}