diff --git a/.github/dependabot.yml b/.github/dependabot.yml
old mode 100644
new mode 100755
diff --git a/.github/reto_1/hola_mundo.py b/.github/reto_1/hola_mundo.py
new file mode 100755
index 0000000..3df37c5
--- /dev/null
+++ b/.github/reto_1/hola_mundo.py
@@ -0,0 +1,5 @@
+def hello_world():
+    print("Hello  Alex Ferreira")
+
+if __name__ == '__main__':
+    hello_world()
diff --git a/.github/script/STEP b/.github/script/STEP
old mode 100644
new mode 100755
index 573541a..d00491f
--- a/.github/script/STEP
+++ b/.github/script/STEP
@@ -1 +1 @@
-0
+1
diff --git a/.github/workflows/ hola-mundo.yml b/.github/workflows/ hola-mundo.yml
new file mode 100644
index 0000000..d24564d
--- /dev/null
+++ b/.github/workflows/ hola-mundo.yml	
@@ -0,0 +1,8 @@
+name: hola-mundo
+on: [push]
+jobs:
+  hola-mundo:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Hola mundo
+        run: python reto_1/hola_mundo.py
diff --git a/.github/workflows/0-inicio.yml b/.github/workflows/0-inicio.yml
old mode 100644
new mode 100755
diff --git a/.github/workflows/1-crea-primer-workflow.yml b/.github/workflows/1-crea-primer-workflow.yml
old mode 100644
new mode 100755
diff --git a/.github/workflows/2-conoce-triggers.yml b/.github/workflows/2-conoce-triggers.yml
old mode 100644
new mode 100755
diff --git a/.github/workflows/3-aprende-expresiones.yml b/.github/workflows/3-aprende-expresiones.yml
old mode 100644
new mode 100755
diff --git a/.github/workflows/4-usa-contextos.yml b/.github/workflows/4-usa-contextos.yml
old mode 100644
new mode 100755
diff --git a/.github/workflows/5-uso-variables.yml b/.github/workflows/5-uso-variables.yml
old mode 100644
new mode 100755
diff --git a/.github/workflows/hola-mundo.yml b/.github/workflows/hola-mundo.yml
new file mode 100755
index 0000000..f499ec6
--- /dev/null
+++ b/.github/workflows/hola-mundo.yml
@@ -0,0 +1,12 @@
+name: hola-mundo
+on:
+  push:
+    branches: [ "aprendiendo-github-actions" ]
+jobs:
+  hola-mundo:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+      - name: Hola mundo
+        run: python .github/reto_1/hola_mundo.py
\ No newline at end of file
diff --git a/.gitignore b/.gitignore
old mode 100644
new mode 100755
diff --git a/LICENSE b/LICENSE
old mode 100644
new mode 100755
diff --git a/README.md b/README.md
old mode 100644
new mode 100755
index c2530f3..03f43cc
--- a/README.md
+++ b/README.md
@@ -20,7 +20,7 @@ _Aprende los conceptos básicos para crear tu primer flujo de CI/CD para tus pro
   Do not use quotes on the <details> tag attributes.
 -->
 
-<details id=0 open>
+<details id=0>
 <summary><h2>Bienvenido</h2></summary>
 
 ¡Bienvenido al Curso Básico de GitHub Actions de Platzi! en este curso aprenderás a realizar flujos de Integración y Despliegue Continúo (CI/CD) para tus proyectos personales, así como automatizar cualquier proceso que que te ayude a impulsar tu flujo de trabajo :rocket:.
@@ -52,7 +52,7 @@ _Aprende los conceptos básicos para crear tu primer flujo de CI/CD para tus pro
   TBD-step-1-notes.
 -->
 
-<details id=1>
+<details id=1 open>
 <summary><h2>Paso 1: Crea tu primer workflow file</h2></summary>
 
 _¡Bienvenido al "Curso Básico de GitHub Actions"! :wave:_