#define botao 5
#define led1 2
#define led2 3
#define led3 4

void setup (){
  pinMode (led1, OUTPUT);
  pinMode (led2, OUTPUT);
  pinMode (led3, OUTPUT);
  pinMode (botao, INPUT_PULLUP);
}
void loop()
{
  digitalWrite (led3, HIGH);
  while(digitalRead(botao)){
  digitalWrite (led3, LOW);
  digitalWrite (led2, HIGH);
  delay(2000);
  digitalWrite(led1, HIGH);
  digitalWrite(led2, LOW);
  delay(2000);
  }
  delay(100);
  digitalWrite(led1, LOW);
  
}