LeituraLED

#define BOTAO 7
#define LED1 3
#define LED2 4
#define LED3 5
#define LED4 6
void setup() {
  pinMode(LED1, OUTPUT);
  pinMode(LED2, OUTPUT);
  pinMode(LED3, OUTPUT);
  pinMode(LED4, OUTPUT);
  pinMode(BOTAO, INPUT);
}
void loop() 

{

  if (digitalRead(BOTAO) == LOW) 
  {   digitalWrite(LED1, HIGH);
      delay(500);
      digitalWrite(LED2, HIGH);
      delay(500);
      digitalWrite(LED3, HIGH);
      delay(500);
      digitalWrite(LED4, HIGH);
      delay(500);
  }
  else 
  {   digitalWrite(LED1, LOW);
      delay(500);
      digitalWrite(LED2, LOW);
      delay(500);
      digitalWrite(LED3, LOW);
      delay(500);
      digitalWrite(LED4, LOW);
      delay(500);
  }
  
}