diff --git a/index.js b/index.js
index 0b26b16..8fcc8cb 100644
--- a/index.js
+++ b/index.js
@@ -1,18 +1,94 @@
-const cron = require('node-schedule');
-const git = require('simple-git')();
+/*
+ * @Author: IoTcat (https://iotcat.me) 
+ * @Date: 2019-12-31 11:59:49 
+ * @Last Modified by: IoTcat
+ * @Last Modified time: 2019-12-31 18:28:21
+ */
+module.exports = function(o_params){
 
+	/* factory mode */
+	var o = {
+		dir: './',
+		debug: false,
+		allowNotice: true,
+		pull: (params, callback) => pull(params, callback),
+		push: (params, callback) => push(params, callback),
+		sync: (callback, params_pull, params_push) => sync(callback, params_pull, params_push),
+		schedule: (time, callback, params_pull, params_push) => schedule(time, callback, params_pull, params_push)
+	}
 
 
-/*
-	cron.scheduleJob('1-50 * * * * *', function(){
-		console.log('scheduleCronstyle:' + new Date());
-	});
-*/
+	/* merge params */
+	Object.assign(o, o_params);
+
+
+	/* modules import */
+	const cron = require('node-schedule');
+	const git = require('simple-git')(o.dir);
+
+	/* Git pull action */
+	var pull = function(params_user, callback){
+		var params = {
+			remote: {
+				repo: 'origin',
+				branch: 'master'
+			},
+			pull_params: {}
+		}
+		Object.assign(params, params_user);
+
+		git.pull(params.remote.repo, 
+			params.remote.branch, 
+			params.pull_params, 
+			function(){
+				if(o.allowNotice){
+					console.log(new Date() + ' - cron-git: git pull done.');
+				}
+   				if(callback !== undefined){
+   					callback();
+   				}
+			});
+	}
+
+	/* Git push action */
+	var push = function(params_user, callback){
+		var params = {
+			add: {
+				path: './*'
+			},
+			commit: {
+				message: "Committed by cron-git from "+ require('os').hostname()
+			},
+			push_params: ['-u', 'origin', 'master']
+		}
+		Object.assign(params, params_user);
 
+		git.add(params.add.path)
+   			.commit(params.commit.message)
+   			.push(params.push_params, function(){
+				if(o.allowNotice){
+					console.log(new Date() + ' - cron-git: git push done.');
+				}
+   				if(callback !== undefined){
+   					callback();
+   				}
+   			});
+	}
 
-git.pull('origin', 'master', {'--no-rebase': null}, ()=>{console.log(new Date() + ' - cron-git: git pull done.' + require('os').hostname())});
+	/* sync action */
+	var sync = function(callback, params_pull, params_push){
+		push(params_push);
+		pull(params_pull);
+		push(params_push, callback);
+	}
 
+	/* cron sync */
+	var schedule = function(time, callback, params_pull, params_push){
+		cron.scheduleJob(time, function(){
+			console.log(new Date() + ' - cron-git: Scheduled sync begin.');
+			sync(callback, params_pull, params_push);
+		});
+	}
 
-git.add('./*')
-   .commit("Committed by cron-git auto")
-   .push(['-u', 'origin', 'master'], () => console.log(new Date() + ' - cron-git: git push done.'));
\ No newline at end of file
+	return o;
+}
diff --git a/node_modules/os/.npmignore b/node_modules/os/.npmignore
new file mode 100644
index 0000000..e920c16
--- /dev/null
+++ b/node_modules/os/.npmignore
@@ -0,0 +1,33 @@
+# Logs
+logs
+*.log
+npm-debug.log*
+
+# Runtime data
+pids
+*.pid
+*.seed
+
+# Directory for instrumented libs generated by jscoverage/JSCover
+lib-cov
+
+# Coverage directory used by tools like istanbul
+coverage
+
+# Grunt intermediate storage (http://gruntjs.com/creating-plugins#storing-task-files)
+.grunt
+
+# node-waf configuration
+.lock-wscript
+
+# Compiled binary addons (http://nodejs.org/api/addons.html)
+build/Release
+
+# Dependency directory
+node_modules
+
+# Optional npm cache directory
+.npm
+
+# Optional REPL history
+.node_repl_history
diff --git a/node_modules/os/LICENSE b/node_modules/os/LICENSE
new file mode 100644
index 0000000..39b96a4
--- /dev/null
+++ b/node_modules/os/LICENSE
@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2016 Diego Rodríguez Baquero
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/node_modules/os/README.md b/node_modules/os/README.md
new file mode 100644
index 0000000..a7138d5
--- /dev/null
+++ b/node_modules/os/README.md
@@ -0,0 +1,24 @@
+# node-os [![npm](https://img.shields.io/npm/v/os.svg)](https://www.npmjs.com/package/os) [![npm](https://img.shields.io/npm/dm/os.svg)](https://www.npmjs.com/package/os) [![npm](https://img.shields.io/npm/l/os.svg)](LICENSE)
+#### NodeJS Core Module Extended
+
+## Installation
+
+```bash
+npm i os --save
+```
+
+## Usage
+
+In your node program:
+
+```js
+var os = require('os')
+```
+
+## API
+
+https://nodejs.org/api/os.html
+
+## License
+
+MIT. Copyright (c) [Diego Rodríguez Baquero](https://diegorbaquero.com).
diff --git a/node_modules/os/index.js b/node_modules/os/index.js
new file mode 100644
index 0000000..889b75f
--- /dev/null
+++ b/node_modules/os/index.js
@@ -0,0 +1 @@
+module.exports = require('os')
diff --git a/node_modules/os/package.json b/node_modules/os/package.json
new file mode 100644
index 0000000..e5fcd99
--- /dev/null
+++ b/node_modules/os/package.json
@@ -0,0 +1,55 @@
+{
+  "_from": "os",
+  "_id": "os@0.1.1",
+  "_inBundle": false,
+  "_integrity": "sha1-IIhF6J4ZOtTZcUdLk5R3NqVtE/M=",
+  "_location": "/os",
+  "_phantomChildren": {},
+  "_requested": {
+    "type": "tag",
+    "registry": true,
+    "raw": "os",
+    "name": "os",
+    "escapedName": "os",
+    "rawSpec": "",
+    "saveSpec": null,
+    "fetchSpec": "latest"
+  },
+  "_requiredBy": [
+    "#USER",
+    "/"
+  ],
+  "_resolved": "https://registry.npmjs.org/os/-/os-0.1.1.tgz",
+  "_shasum": "208845e89e193ad4d971474b93947736a56d13f3",
+  "_spec": "os",
+  "_where": "e:\\git\\cron-git",
+  "author": {
+    "name": "Diego Rodríguez Baquero",
+    "email": "diegorbaquero@gmail.com",
+    "url": "https://diegorbaquero.com"
+  },
+  "bugs": {
+    "url": "https://github.com/DiegoRBaquero/node-os/issues"
+  },
+  "bundleDependencies": false,
+  "deprecated": false,
+  "description": "NodeJS Core Module Extended",
+  "homepage": "https://github.com/DiegoRBaquero/node-os#readme",
+  "keywords": [
+    "node",
+    "os",
+    "core",
+    "module"
+  ],
+  "license": "MIT",
+  "main": "index.js",
+  "name": "os",
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/DiegoRBaquero/node-os.git"
+  },
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "version": "0.1.1"
+}
diff --git a/package-lock.json b/package-lock.json
index ef9a9d4..b6d1374 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -75,6 +75,11 @@
       "resolved": "https://registry.npmjs.org/object-keys/-/object-keys-1.1.1.tgz",
       "integrity": "sha512-NuAESUOUMrlIXOfHKzD6bpPu3tYt3xvjNdRIQ+FeT0lNb4K8WR70CaDxhuNguS2XG+GjkyMwOzsN5ZktImfhLA=="
     },
+    "os": {
+      "version": "0.1.1",
+      "resolved": "https://registry.npmjs.org/os/-/os-0.1.1.tgz",
+      "integrity": "sha1-IIhF6J4ZOtTZcUdLk5R3NqVtE/M="
+    },
     "simple-git": {
       "version": "1.129.0",
       "resolved": "https://registry.npmjs.org/simple-git/-/simple-git-1.129.0.tgz",
diff --git a/package.json b/package.json
index 76562c2..2e172fc 100644
--- a/package.json
+++ b/package.json
@@ -22,6 +22,7 @@
   "homepage": "https://github.com/IoTcat/cron-git#readme",
   "dependencies": {
     "node-schedule": "^1.3.2",
+    "os": "^0.1.1",
     "simple-git": "^1.129.0"
   }
 }
diff --git a/test.js b/test.js
new file mode 100644
index 0000000..97abbc3
--- /dev/null
+++ b/test.js
@@ -0,0 +1,3 @@
+const crongit = require('./index.js')();
+
+crongit.sync();