diff --git a/sketch_lcd/sketch_lcd.ino b/sketch_lcd/sketch_lcd.ino
index 842a936..4037c98 100644
--- a/sketch_lcd/sketch_lcd.ino
+++ b/sketch_lcd/sketch_lcd.ino
@@ -11,65 +11,67 @@
 
 // init
 DHT dht(DHT_APin, DHT_Type);
-LiquidCrystal lcd(9, 10, 4, 5, 6, 7); // syntax: LiquidCrystal(rs, enable, d4, d5, d6, d7) 
+LiquidCrystal lcd(9, 10, 4, 5, 6, 7); // syntax: LiquidCrystal(rs, enable, d4, d5, d6, d7)
 
-// defs
-int ledPin = 13;
+int timer = 0;
 
 void setup() { // put your setup code here, to run once:
 	Serial.begin(9600);
 	dht.begin();
 	lcd.begin(16, 2);
-	pinMode(ledPin, OUTPUT);
 
-	lcd.print("    hue hue");
-	lcd.setCursor(0, 2);
-	lcd.print("    boot");
-	delay(500);
-	lcd.print(".");
-	delay(500);
-	lcd.print(".");
-	delay(500);
-	lcd.print(".");
-	delay(1000);
+	pinMode(13, OUTPUT); // 13 es el pin con el led
+
+	lcd.print("  hue hue hue");
 
 }
 
 void loop() { // put your main code here, to run repeatedly:
+	timer--;
 
-	// Reading temperature or humidity takes about 250 milliseconds!
-	// Sensor readings may also be up to 2 seconds 'old' (its a very slow sensor)
-	float h = dht.readHumidity();
-	float t = dht.readTemperature(); // lectura en Celsius, readTemperature(true) para Fahrenheit
+	if (timer <= 0) {
+		// Reading temperature or humidity takes about 250 milliseconds!
+		// Sensor readings may also be up to 2 seconds 'old' (its a very slow sensor)
+		float h = dht.readHumidity();
+		float t = dht.readTemperature(); // lectura en Celsius, readTemperature(true) para Fahrenheit
 
-	if (isnan(h) || isnan(t)) {
-		Serial.println("E"); // E = error, para el script en python que lee
-		return;
+		if (isnan(h) || isnan(t)) {
+			Serial.println("E"); // E = error, para el script en python que lee
+			return;
+		}
+
+		// Compute heat index in Celsius (isFahreheit = false)
+		float hic = dht.computeHeatIndex(t, h, false); // sensación térmica
+
+		// D = DHT, para el script en python que leerá esto
+		Serial.print("D h:");
+		Serial.print(h);
+		Serial.print(" t:");
+		Serial.print(t);
+		Serial.print(" i:");
+		Serial.print(hic);
+		Serial.println("");
+
+		lcd.clear();
+		lcd.print(t);
+		lcd.print("C    ");
+		lcd.print(h);
+		lcd.print("%");
+		lcd.setCursor(0, 2);
+		lcd.print(hic);
+		lcd.print("C");
+
+		digitalWrite(13, HIGH);
+		delay(100);
+		digitalWrite(13, LOW);
+		//delay(60000); // 1 minuto
+
+		timer = 60;
 	}
 
-	// Compute heat index in Celsius (isFahreheit = false)
-	float hic = dht.computeHeatIndex(t, h, false); // sensación térmica
-
-	// D = DHT, para el script en python que leerá esto
-	Serial.print("D h:");
-	Serial.print(h);
-	Serial.print(" t:");
-	Serial.print(t);
-	Serial.print(" i:");
-	Serial.print(hic);
-	Serial.println("");
-
-	lcd.clear();
-	lcd.print(t);
-	lcd.print("C    ");
-	lcd.print(h);
-	lcd.print("%");
-	lcd.setCursor(0, 2);
-	lcd.print(hic);
-	lcd.print("C");
-
-	digitalWrite(ledPin, HIGH);
-	delay(100);
-	digitalWrite(ledPin, LOW);
-	delay(60000); // 1 minuto
+	lcd.setCursor(14, 2);
+	if (timer < 10)
+		lcd.print(0);
+	lcd.print(timer);
+	delay(1000);
 }