diff --git a/bin/emulator.js b/bin/emulator.js
index 41c9402..408c0cd 100644
--- a/bin/emulator.js
+++ b/bin/emulator.js
@@ -69,4 +69,40 @@ function normalizeExecArgs(command, options){
   };
 }
 
-module.exports = Emulator;
+// thread
+process.on('message', function (project){
+  var stream;
+
+  var emulator = new Emulator({
+    cwd: project.path,
+    command: project.command.value
+  });
+
+  stream = emulator.start();
+
+  stream.stdout.on('data', function (data){
+    process.send({
+      event: 'data',
+      project: project,
+      data: data.toString()
+    });
+  });
+
+  stream.stderr.on('data', function (error){
+    emulator.stop();
+    process.send({
+      event: 'error',
+      project: project,
+      data: error.toString()
+    });
+  });
+
+  stream.on('close', function (signal){
+    emulator.stop();
+    process.send({
+      event: 'close',
+      project: project,
+      data: signal.toString()
+    });
+  });
+});
diff --git a/bin/thread.js b/bin/thread.js
index 85063ef..c94a600 100644
--- a/bin/thread.js
+++ b/bin/thread.js
@@ -4,24 +4,24 @@
 
 'use strict';
 
-var cluster = require('cluster');
-
+var path = require('path');
 var ipc = require('ipc-main');
+var fork = require('child_process').fork;
 
 // cache
-var workers = {};
+var threads = {};
 
 /**
- * killWorker
+ * killThread
  * @param name
  */
-function killWorker(name){
-  var worker = workers[name];
+function killThread(name){
+  var thread = threads[name];
 
-  if (worker && !worker.isDead()) {
-    worker.kill('SIGTERM');
+  if (thread && thread.connected) {
+    thread.kill('SIGTERM');
 
-    delete workers[name];
+    delete threads[name];
   }
 }
 
@@ -29,11 +29,11 @@ module.exports = {
   start: function (){
     ipc.on('emulator', function (event, project, action){
       var key = project.name + '-' + project.command.name;
-      var worker = workers[key];
+      var thread = threads[key];
 
       switch (action) {
         case 'start':
-          if (!worker || worker.isDead()) {
+          if (!thread || !thread.connected) {
             var env = {};
 
             Object.keys(process.env).forEach(function (key){
@@ -44,29 +44,31 @@ module.exports = {
               env[item.name] = item.value;
             });
 
-            worker = cluster.fork(env);
+            thread = fork(path.join(__dirname, 'emulator'), {
+              env: env
+            });
 
-            worker.on('message', function (message){
+            thread.on('message', function (message){
               event.sender.send('emulator', message.event, message.project, message.data);
             });
 
-            worker.on('error', function (){
-              killWorker(project.name);
+            thread.on('error', function (){
+              killThread(project.name);
             });
 
             delete project.env;
 
-            worker.send(project);
+            thread.send(project);
 
-            workers[project.name] = worker;
+            threads[project.name] = thread;
           } else {
             delete project.env;
 
-            worker.send(project);
+            thread.send(project);
           }
           break;
         case 'stop':
-          killWorker(project.name);
+          killThread(project.name);
           break;
       }
     });
diff --git a/main.js b/main.js
index 276ee1c..f3af99f 100644
--- a/main.js
+++ b/main.js
@@ -4,134 +4,91 @@
 
 'use strict';
 
-var cluster = require('cluster');
+// node module
+var path = require('path');
+// module to control application life
+var app = require('app');
+var Menu = require('menu');
+var Tray = require('tray');
+// module to create native browser window
+var BrowserWindow = require('browser-window');
+// custom module
+var windowControl = require('./bin/window-control');
+var openDirectory = require('./bin/open-directory');
+var AppConfigure = require('./bin/app-configure');
+var thread = require('./bin/thread');
 
-if (cluster.isMaster) {
-  // node module
-  var path = require('path');
-  // module to control application life
-  var app = require('app');
-  var Menu = require('menu');
-  var Tray = require('tray');
-  // module to create native browser window
-  var BrowserWindow = require('browser-window');
-  // custom module
-  var windowControl = require('./bin/window-control');
-  var openDirectory = require('./bin/open-directory');
-  var AppConfigure = require('./bin/app-configure');
-  var thread = require('./bin/thread');
+// keep a global reference of the window object, if you don't, the window will
+// be closed automatically when the javascript object is GCed
+var mainTray = null;
+var mainWindow = null;
+// const var
+const APPNAME = '命令管理器';
+const ICON = path.join(__dirname, './app.ico');
+const INDEX = 'file:///' + path.join(__dirname, 'index.html');
 
-  // keep a global reference of the window object, if you don't, the window will
-  // be closed automatically when the javascript object is GCed
-  var mainTray = null;
-  var mainWindow = null;
-  // const var
-  const APPNAME = '命令管理器';
-  const ICON = path.join(__dirname, './app.ico');
-  const INDEX = 'file:///' + path.join(__dirname, 'index.html');
+// quit when all windows are closed
+app.on('window-all-closed', function (){
+  app.quit();
+});
 
-  // quit when all windows are closed
-  app.on('window-all-closed', function (){
-    app.quit();
-  });
+// this method will be called when atom-shell has done everything
+// initialization and ready for creating browser windows
+app.on('ready', function (){
+  // create the tray window
+  mainTray = new Tray(ICON);
 
-  // this method will be called when atom-shell has done everything
-  // initialization and ready for creating browser windows
-  app.on('ready', function (){
-    // create the tray window
-    mainTray = new Tray(ICON);
-
-    mainTray.setToolTip(APPNAME);
-    mainTray.setContextMenu(Menu.buildFromTemplate([
-      {
-        label: '显示窗口',
-        click: function (){
-          mainWindow.show();
-        }
-      },
-      {
-        label: '退出程序',
-        click: function (){
-          app.quit();
-        }
+  mainTray.setToolTip(APPNAME);
+  mainTray.setContextMenu(Menu.buildFromTemplate([
+    {
+      label: '显示窗口',
+      click: function (){
+        mainWindow.show();
       }
-    ]));
+    },
+    {
+      label: '退出程序',
+      click: function (){
+        app.quit();
+      }
+    }
+  ]));
 
-    // create the browser window
-    mainWindow = new BrowserWindow({
-      width: 1024,
-      height: 768,
-      icon: ICON,
-      'min-width': 1024,
-      'min-height': 768,
-      title: APPNAME,
-      frame: false,
-      center: true,
-      'use-content-size': true
-    });
-
-    // and load the index.html of the app
-    mainWindow.loadURL(INDEX);
-    // emitted when the window is closed
-    mainWindow.on('closed', function (){
-      // dereference the window object, usually you would store windows
-      // in an array if your app supports multi windows, this is the time
-      // when you should delete the corresponding element
-      mainTray.destroy();
-
-      mainTray = null;
-      mainWindow = null;
-    });
-
-    // window control
-    windowControl(ICON, mainWindow, mainTray);
-
-    // open directory
-    openDirectory(mainWindow);
-
-    // app configure
-    new AppConfigure(mainWindow, mainTray);
-
-    // emulator start
-    thread.start();
+  // create the browser window
+  mainWindow = new BrowserWindow({
+    width: 1024,
+    height: 768,
+    icon: ICON,
+    'min-width': 1024,
+    'min-height': 768,
+    title: APPNAME,
+    frame: false,
+    center: true,
+    'use-content-size': true
   });
-} else {
-  var Emulator = require('./bin/emulator');
 
-  process.on('message', function (project){
-    var stream;
+  // and load the index.html of the app
+  mainWindow.loadURL(INDEX);
+  // emitted when the window is closed
+  mainWindow.on('closed', function (){
+    // dereference the window object, usually you would store windows
+    // in an array if your app supports multi windows, this is the time
+    // when you should delete the corresponding element
+    mainTray.destroy();
 
-    var emulator = new Emulator({
-      cwd: project.path,
-      command: project.command.value
-    });
-
-    stream = emulator.start();
-
-    stream.stdout.on('data', function (data){
-      process.send({
-        event: 'data',
-        project: project,
-        data: data.toString()
-      });
-    });
-
-    stream.stderr.on('data', function (error){
-      emulator.stop();
-      process.send({
-        event: 'error',
-        project: project,
-        data: error.toString()
-      });
-    });
-
-    stream.on('close', function (signal){
-      emulator.stop();
-      process.send({
-        event: 'close',
-        project: project,
-        data: signal.toString()
-      });
-    });
+    mainTray = null;
+    mainWindow = null;
   });
-}
+
+  // window control
+  windowControl(ICON, mainWindow, mainTray);
+
+  // open directory
+  openDirectory(mainWindow);
+
+  // app configure
+  new AppConfigure(mainWindow, mainTray);
+
+  // emulator start
+  thread.start();
+});
\ No newline at end of file
diff --git a/static/css/index.css b/static/css/index.css
index b0270d6..380a410 100644
--- a/static/css/index.css
+++ b/static/css/index.css
@@ -494,7 +494,3 @@ header [class*=" icon-"] {
   height: calc(100% - 32px);
   background: url(../images/no-data.png) center no-repeat;
 }
-.ui-terminal-cursor {
-  background: #fff;
-  color: #181818;
-}