byte led = 6;
byte s1 = 4; 
byte s0 = 2;
void setup() 
{
pinMode(led, OUTPUT);
pinMode(s1, INPUT);
pinMode(s0, INPUT);
  Serial.begin(9600);
}

void loop() 
{
  if(digitalRead(s0)==HIGH && digitalRead(s1)== HIGH)
  {
   digitalWrite(led, HIGH);
   Serial.println("led ligado"); 
  }
  if(digitalRead(s0)==LOW && digitalRead(s1)==LOW)
  {
    digitalWrite(led, LOW);
    Serial.println("led desligado");
  }
  if(digitalRead(s0)==LOW && digitalRead(s1)==HIGH)
  {
    digitalWrite(led, LOW);
    Serial.println("led desligado");
  }
  }