int botao = 2;
int led = 4;
bool BS1 = 0, S1 = 0;
int cont = 0;

void setup() 
{
  pinMode(botao, INPUT);
  pinMode(led, OUTPUT);
  Serial.begin(115200);
  
}

void loop() 
{

  BS1 = digitalRead(botao);
  
  if(BS1 == 1 && S1 == 0)
  {
    cont++;
    S1 = 1;
    
  }

  if(BS1 == 0 && S1 == 1)
  {
    S1 = 0;
  }

  if(cont == 1)
  {
    digitalWrite(led,HIGH);
  }
  if(cont == 2)
  {
    digitalWrite(led,LOW);
  }
  if(cont == 0)
  {
    digitalWrite(led,LOW);
  }
  if ( cont == 2 )cont = 0;
  delay(100);
  Serial.println(cont);

 
}