void setup() {
 pinMode(8, OUTPUT);//VERMELHO
 pinMode(9, OUTPUT);//AMARELO
 pinMode(10, OUTPUT);// VERDE

 //PEDESTRE
 pinMode(1, OUTPUT);//PEVERMELHO
 pinMode(2, OUTPUT);// PEVERDE


}

void loop() {

//SEMÁFORO VERMELHO
 digitalWrite (8, HIGH);
 digitalWrite (9, LOW);
 digitalWrite (10, LOW);
  //PEDESTRE VERDE
 digitalWrite (1, LOW);
 digitalWrite (2, HIGH);
 delay(4000);

//SEMÁFORO VERDE
 digitalWrite (8, LOW);
 digitalWrite (9, LOW);
 digitalWrite (10, HIGH);
   //PEDESTRE VERMELHO
 digitalWrite (1, HIGH);
 digitalWrite (2, LOW);
 delay(3000);


 digitalWrite (8, LOW);
 digitalWrite (9, HIGH);
 digitalWrite (10, LOW);
 delay(2000);

}