diff --git a/README.md b/README.md
index ac979aa..2fbe776 100644
--- a/README.md
+++ b/README.md
@@ -73,57 +73,40 @@ python scripts/test.py
 
 ### 3.2 Lanuch and Run
 
--**Step 1**: In one terminal, open the core.
+- **Use slide bar to control**
 
-```bash
-roscore #open another tab
-```
+    - lanuch ros and rviz
 
--**Step 2**: Launch
+    ```
+    roslanuch myCobotRos control_slider.lanuch
+    ```
 
-a) For display or marker control, in second terminal, run:
+    - run python script
 
-```bash
-roslaunch myCobotROS mycobot.launch
-```
+    ```
+    rosrun myCobotROS control_slider.py
+    ```
 
-b) For slider bar control, in second terminal, run:
+- **The model moves with the real manipulator**
 
-```
-roslaunch myCobotROS control.launch
-```
+    - lanuch ros and rviz
 
--**Step 3**: Open rviz to view robot
+    ```
+    roslanuch myCobotRos mycobot.lanuch
+    ```
 
-```bash
-rosrun rviz rviz
-```
+    - run python script
 
-If you use the above command, then you may need to manually add some model components. If you don't want to be so troublesome, you can use the following command to load a saved **myCobot** model.
+    ```
+    rosrun myCobotROS display.py
+    ```
+
+
+<!-- If you use the above command, then you may need to manually add some model components. If you don't want to be so troublesome, you can use the following command to load a saved **myCobot** model.
 
 ```bash
 rosrun rviz rviz -d rospack find myCobotROS/config/mycobot.rviz
-```
-
--**Step 4**: Run python script
-
-a) For display
-
-```bash
-rosrun myCobotROS display.py
-```
-
-b) For slider bar.
-
-```bash
-rosrun myCobotROS control_slider.py
-```
-
-c) For marker control
-
-```bash
-rosrun myCobotROS control_marker.py
-```
+``` -->
 
 ## Q & A
 
diff --git a/launch/mycobot.launch b/launch/mycobot.launch
index bc50e7a..ba52b7d 100644
--- a/launch/mycobot.launch
+++ b/launch/mycobot.launch
@@ -1,10 +1,10 @@
 <launch>
 	<arg name="model" default="$(find myCobotROS)/urdf/mycobot_urdf.urdf"/>
+	<arg name="rvizconfig" default="$(find myCobotROS)/config/mycobot.rviz" />
 	<param name="robot_description" command="$(find xacro)/xacro --inorder $(arg model)" />
 	<node name="robot_state_publisher" pkg="robot_state_publisher" type="state_publisher" />
 
-	<!-- <node name="joint_state_publisher" pkg="joint_state_publisher" type="joint_state_publisher"> 
-		<param name="use_gui" value="true"/>	
-	</node>  -->
-
+	<node name="control_slider" pkg="myCobotROS" type="control_slider.py"/> 
+	
+	<node name="rviz" pkg="rviz" type="rviz" args="-d $(arg rvizconfig)" required="true" />
 </launch>
diff --git a/scripts/display.py b/scripts/display.py
index 0743c95..28a230d 100755
--- a/scripts/display.py
+++ b/scripts/display.py
@@ -41,8 +41,6 @@ def talker():
         angles = mycobot.get_radians()
         data_list = []
         for index, value in enumerate(angles):
-            if index != 2:
-                value *= -1
             data_list.append(value)
 
         joint_state_send.position = data_list
diff --git a/scripts/test.py b/scripts/test.py
index ed36c4d..7be8093 100644
--- a/scripts/test.py
+++ b/scripts/test.py
@@ -8,21 +8,8 @@ if __name__ == '__main__':
                                     shell=True).decode()
     mycobot = MyCobot(port)
 
-    # port = subprocess.run(['echo -n /dev/ttyUSB*'], 
-    #                             stdout=subprocess.PIPE, 
-    #                             shell=True).stdout.decode('utf-8')
-    # mycobot = MyCobot3(port)
-
     print('Start check api\n')
 
-    color_name = ['red', 'green', 'blue']
-    color_code = ['ff0000', '00ff00', '0000ff']
-    print('::ser_led_color()')
-    i = random.randint(0, len(color_code) - 1)
-    mycobot.set_led_color(color_code[i])
-    print('==>set color {}\n'.format(color_name[i]))
-    time.sleep(0.5)
-
     print('::get_angles()')
     print('==> degrees: {}\n'.format(mycobot.get_angles()))
     time.sleep(0.5)