#include <MillisTimer.h>
#include<SoftwareSerial.h>

const int rx=1;
const int tx=0;
SoftwareSerial Serial(rx,tx);
const int button=2;
const int red=3;
int redState=LOW;
const int blue=4;
int blueState=LOW;
int cont=0;
bool a= false;
int lectura;
int interval=500;
unsigned long prev_ms=0;
unsigned long current_ms=0;
// the setup function runs once when you press reset or power the board
void setup() {
  // initialize digital pin LED_BUILTIN as an output.
  Serial.begin(9600);
  pinMode(3, OUTPUT);
  pinMode(4, OUTPUT);
  pinMode(button, INPUT);
  pinMode(tx, OUTPUT);
}

// the loop function runs over and over again forever
void loop() {
  current_ms= millis();
  lectura=digitalRead(button);
  Serial.println(lectura);
  Serial.println("hola");
  if(lectura==HIGH)
  {
    digitalWrite(blue,LOW);
  }
  else
  {
    digitalWrite(blue,HIGH);
  }
  if(current_ms - prev_ms >= 500 )
  {
    prev_ms = current_ms;
    if(redState==LOW)
    {          
       redState=HIGH;
    }
    else
    {
      redState=LOW;
    }
    digitalWrite(red,redState);
    }
 }