diff --git a/PULL_REQUEST_TEMPLATE.md b/PULL_REQUEST_TEMPLATE.md
new file mode 100644
index 0000000..cb62c29
--- /dev/null
+++ b/PULL_REQUEST_TEMPLATE.md
@@ -0,0 +1,17 @@
+## DESCRIPTION
+
+Solución al reto 04 de Escuela de JavaScript
+
+Nombre: Alfonso Neil Jiménez Casallas
+Usuario Platzi: @alfonsoneiljimenez
+
+## GRUPO
+- [ X ] Martes
+- [ ] Miercoles
+- [ ] Jueves
+
+## Reto:
+  - [ X ] Primer problema
+  - [ X ] Segundo problema
+  - [ X ] Tercer problema
+  - [ X ] Cuarto Problema (Opcional)
\ No newline at end of file
diff --git "a/PULL_REQUEST_TEMPLATE.md\t" "b/PULL_REQUEST_TEMPLATE.md\t"
deleted file mode 100644
index 9a4d861..0000000
--- "a/PULL_REQUEST_TEMPLATE.md\t"
+++ /dev/null
@@ -1,17 +0,0 @@
-## DESCRIPTION
-
-Solución al reto 04 de Escuela de JavaScript
-
-Nombre:
-Usuario Platzi:
-
-## GRUPO
-- [ ] Martes
-- [ ] Miercoles
-- [ ] Jueves
-
-## Reto:
-  - [ ] Primer problema
-  - [ ] Segundo problema
-  - [ ] Tercer problema
-  - [ ] Cuarto Problema (Opcional)
\ No newline at end of file
diff --git a/package-lock.json b/package-lock.json
new file mode 100644
index 0000000..c90c067
--- /dev/null
+++ b/package-lock.json
@@ -0,0 +1,13 @@
+{
+  "name": "escuelajs-reto-04",
+  "version": "1.0.0",
+  "lockfileVersion": 1,
+  "requires": true,
+  "dependencies": {
+    "xmlhttprequest": {
+      "version": "1.8.0",
+      "resolved": "https://registry.npmjs.org/xmlhttprequest/-/xmlhttprequest-1.8.0.tgz",
+      "integrity": "sha1-Z/4HXFwk/vOfnWX197f+dRcZaPw="
+    }
+  }
+}
diff --git a/package.json b/package.json
index bf060d5..0abd8ad 100644
--- a/package.json
+++ b/package.json
@@ -20,5 +20,8 @@
   "bugs": {
     "url": "https://github.com/platzi/escuelajs-reto-04/issues"
   },
-  "homepage": "https://github.com/platzi/escuelajs-reto-04#readme"
-}
\ No newline at end of file
+  "homepage": "https://github.com/platzi/escuelajs-reto-04#readme",
+  "dependencies": {
+    "xmlhttprequest": "^1.8.0"
+  }
+}
diff --git a/src/index.js b/src/index.js
index 4c965e7..a189b3e 100644
--- a/src/index.js
+++ b/src/index.js
@@ -1,9 +1,44 @@
+const XMLHttpRequest = require("xmlhttprequest").XMLHttpRequest;
+
+const API = 'https://us-central1-escuelajs-api.cloudfunctions.net/orders';
+const xhttp = new XMLHttpRequest();
+
+
+const fetchOrders = (url_api) => {
+  xhttp.responseType = 'json';
+  xhttp.open('GET', url_api, true);
+  xhttp.send();
+  return new Promise((resolve, reject) => {
+  xhttp.onreadystatechange = (event) => {
+    if (xhttp.readyState === 4) {
+      if (xhttp.status == 200){
+		const response = JSON.parse(xhttp.responseText);  
+        resolve(response);
+	  }
+      else reject(Error(`No fue posible entregar la petición desde ${url_api}`));
+    }
+  }
+ })
+}
+
+
+const randomTime = (min, max) => {
+  min = Math.ceil(min);
+  max = Math.floor(max);
+  return Math.floor(Math.random() * (max - min + 1) + min); //The maximum is inclusive and the minimum is inclusive 
+}
+
 const orders = (time, product, table) => {
   console.log(`### Orden: ${product} para ${table}`);
   return new Promise((resolve, reject) => {
-    setTimeout(() => {
-      resolve(`=== Pedido servido: ${product}, tiempo de preparación ${time}ms para la ${table}`);
-    }, time);
+	try{
+	   setTimeout(() => {
+          resolve(`=== Pedido servido: ${product}, tiempo de preparación ${time}ms para la ${table}`);
+          }, time);
+	}catch(err){
+	   reject(Error(`Error durante la entrega del pedido: ${err}`));
+	}  
+
   });
 }
 
@@ -16,9 +51,49 @@ const menu = {
 const table = ['Mesa 1', 'Mesa 2', 'Mesa 3', 'Mesa 4', 'Mesa 5'];
 
 const waiter = () => {
-  orders(6000, menu.hamburger, table[3])
+  orders(randomTime(1000, 8000), menu.hamburger, table[3])
     .then((res) => console.log(res))
     .catch((err) => console.error(err));
 };
 
+const waiter2 = () => {
+  orders(randomTime(1000, 8000), menu.hotdog, table[0])
+    .then((res) => console.log(res));
+	return orders(randomTime(1000, 8000), menu.pizza, table[2])
+	 .then((res) => console.log(res))
+     .catch((err) => console.error(err));
+};
+
+const waiter3 = async() => {
+	try{
+		const order1 = await orders(randomTime(1000, 8000), menu.hotdog, table[1])
+		console.log(order1)
+		const order2 = await orders(randomTime(1000, 8000), menu.pizza, table[1])
+		console.log(order2)
+		const order3 = await orders(randomTime(1000, 8000), menu.hotdog, table[1])
+		console.log(order3)
+	}catch(err){
+		console.error(err)
+	}
+};
+
+const waiter4 = async() => {
+	try{
+		const order1 = await fetchOrders(API)
+		console.log(`=== Pedido servido: ${order1.data}`)
+		const order2 = await fetchOrders(API)
+		console.log(`=== Pedido servido: ${order2.data}`)
+		const order3 = await fetchOrders(API)
+		console.log(`=== Pedido servido: ${order3.data}`)
+		const order4 = await fetchOrders(API)
+		console.log(`=== Pedido servido: ${order4.data}`)
+	}catch(err){
+		console.log(`Error durante la entrega del pedido: ${err}`)
+	}
+};
+
+
 waiter();
+waiter2();
+waiter3();
+waiter4();
\ No newline at end of file