long inicio;
long b;
void setup(){
  inicio = millis();
  pinMode(13, OUTPUT);
  pinMode(12, OUTPUT);
  pinMode(11, OUTPUT);
  pinMode(7, OUTPUT);
}

void loop(){
  if(digitalRead(7)==0){
    b=0;
  }
  if(b==0){
    digitalWrite(10, HIGH);
  }
  if(millis()-inicio < 3000){
    digitalWrite(13, HIGH);
    digitalWrite(11, LOW);
  }
  if(millis()-inicio > 3000 && millis()-inicio<7000){
    digitalWrite(12, HIGH);
    digitalWrite(13, LOW);
  }
  if(millis()-inicio > 7000){
    digitalWrite(11, HIGH);
    digitalWrite(12, LOW);
  }
  if(millis()-inicio > 8000){
    inicio=millis();
  }
}