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@@ -2,20 +2,82 @@
 
 This action sync a repository when pushed changes to another repository, like subdir.
 
-**NOTE**:  I use this repo to learn GitHub Actions. Be carrefull with using this.
+## Why?
 
-## Inputs
+I have a Repo with HTML slides and I pushed changes frequently. I also have a second repository which is also a Github Page. This action publish my commits of the first repo in the second one. In the target repository, the source will be copied like sub directory.
 
-** todavia no lo se **
+## Arguments and variables
 
-## Outputs
+There are 3 required arguments:
 
-** todavia no lo se **
+ * `##username/repository_name##`: Target repository name (not url). Show [actions/checkout](https://github.com/actions/checkout#checkout-multiple-repos-side-by-side) documentation.
+ * `##commit_github_username##`: User to show like Author in Github Commit
+ * `##subdir_name_on_target##`: Name of directory on Target Repository
 
-## Ejemplo de uso
+ You have to define the secret `API_TOKEN_GITHUB` in the source repo secrets section. You have define a Token [here](https://github.com/settings/tokens) (set the `repo` permission).
+
+## Usage
+
+Create an action file `.github/workflows/action-sync-repos.yml` in your source repo (where do you want to commit) with the next code:
 
 ```yaml
-uses: tdelvechio/actions-push-repo-to-subdir@v1
-with:
-  who-to-greet: 'Mona the Octocat'
-```
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+on: [push]
+
+jobs:
+  sync-with-gh-page:
+    runs-on: ubuntu-latest
+    name: Sync this repo with GH pages
+    steps:
+    - name: Checkout source repository
+      uses: actions/checkout@v2
+      with:
+        path: source-repo
+    - name: Checkout target repository
+      uses: actions/checkout@v2
+      with:
+        repository: ##username/repository_name##
+        path: target-repo
+        token: ${{ secrets.API_TOKEN_GITHUB }}
+    - name: Sync the repo
+      id: sync
+      uses: tomasdelvechio/actions-push-repo-to-subdir@v1.0.13
+      with:
+        github-username: ##commit_github_username##
+        target-subdir-name: ##subdir_name_on_target##
+```
+
+## Examples
+
+### Sync a repository to github page
+
+The action file content:
+
+```yaml
+on: [push]
+
+jobs:
+  sync-with-gh-page:
+    runs-on: ubuntu-latest
+    name: Sync this repo with GH pages
+    steps:
+    - uses: actions/checkout@v2
+      with:
+        path: source-repo
+    - uses: actions/checkout@v2
+      with:
+        repository: pawunlu/pawunlu.github.io
+        path: target-repo
+        token: ${{ secrets.API_TOKEN_GITHUB }}
+    - name: Sync the repo
+      id: sync
+      uses:  tomasdelvechio/actions-push-repo-to-subdir@v1.0.13
+      with:
+        github-username: 'tomasdelvechio'
+        target-subdir-name: 'slides'
+```
+
+ * **Target Repo**: `pawunlu/pawunlu.github.io` (A Github page repo)
+ * **Github Username**: `tomasdelvechio` (Commit's author)
+ * **Subdir name**: `slides` (You have this directory on [the repository](https://github.com/pawunlu/pawunlu.github.io))
+
+ This file is created in the source repository. Example name: `.github/workflows/action-sync-repos.yml`.
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