semáforo pulsador

 // C++ code

//

int  ledR= 12;

int ledA =9;

int ledV=6;

int pulsador=3;

void setup()

{

  pinMode (ledR,OUTPUT) ;

  pinMode (ledA,OUTPUT) ;

  pinMode (ledV,OUTPUT) ;

  pinMode (pulsador,INPUT) ;

}

void loop()

{

  while (digitalRead(pulsador))

  {

  digitalWrite(ledV,HIGH);

  digitalWrite(ledA,LOW);

  digitalWrite(ledR,LOW);

   }

  digitalWrite(ledV,LOW);

  digitalWrite(ledA,HIGH);

  digitalWrite(ledR,LOW);

   delay (1500);

  digitalWrite(ledV,LOW);

  digitalWrite(ledA,LOW);

  digitalWrite(ledR,HIGH);

  delay (4000);

  digitalWrite(ledV,HIGH);

  digitalWrite(ledA,LOW);

  digitalWrite(ledR,LOW);

  delay (4000);

}