#define LED1V 9
#define LED1R 8
#define LED2V 7
#define LED2R 6
#define LED3V 5
#define LED3R 4
#define LED4V 3
#define LED4R 2


void setup()
{
pinMode(LED1V, OUTPUT);
pinMode(LED1R, OUTPUT);
pinMode(LED2V, OUTPUT);
pinMode(LED2R, OUTPUT);
pinMode(LED3V, OUTPUT);
pinMode(LED3R, OUTPUT);
pinMode(LED4V, OUTPUT);
pinMode(LED4R, OUTPUT);

}


void loop()
{

//Encendido do semáforo verde do cruce 1
//Encendido do semáforo vermello dos cruces 2, 3 e 4
digitalWrite(LED1V, HIGH);
digitalWrite(LED1R, LOW);
digitalWrite(LED2V, LOW);
digitalWrite(LED2R, HIGH);
digitalWrite(LED3V, LOW);
digitalWrite(LED3R, HIGH);
digitalWrite(LED4V, LOW);
digitalWrite(LED4R, HIGH);
delay(3000);

//Encendido do semáforo verde do cruce 2
//Encendido do semáforo vermello dos cruces 1, 3 e 4
digitalWrite(LED1V, LOW);
digitalWrite(LED1R, HIGH);
digitalWrite(LED2V, HIGH);
digitalWrite(LED2R, LOW);
digitalWrite(LED3V, LOW);
digitalWrite(LED3R, HIGH);
digitalWrite(LED4V, LOW);
digitalWrite(LED4R, HIGH);
delay(3000);

//Encendido do semáforo verde do cruce 3
//Encendido do semáforo vermello dos cruces 1, 2 e 4
digitalWrite(LED1V, LOW);
digitalWrite(LED1R, HIGH);
digitalWrite(LED2V, LOW);
digitalWrite(LED2R, HIGH);
digitalWrite(LED3V, HIGH);
digitalWrite(LED3R, LOW);
digitalWrite(LED4V, LOW);
digitalWrite(LED4R, HIGH);
delay(3000);

//Encendido do semáforo verde do cruce 4
//Encendido do semáforo vermello dos cruces 1, 2 e 3
digitalWrite(LED1V, LOW);
digitalWrite(LED1R, HIGH);
digitalWrite(LED2V, LOW);
digitalWrite(LED2R, HIGH);
digitalWrite(LED3V, LOW);
digitalWrite(LED3R, HIGH);
digitalWrite(LED4V, HIGH);
digitalWrite(LED4R, LOW);
delay(3000);


}