diff --git a/Code/C_Code/12.1.1_Joystick/Joystick.c b/Code/C_Code/12.1.1_Joystick/Joystick.c
index a2fc169..fa569c7 100644
--- a/Code/C_Code/12.1.1_Joystick/Joystick.c
+++ b/Code/C_Code/12.1.1_Joystick/Joystick.c
@@ -30,8 +30,8 @@ int main(void){
     
     while(1){
         val_Z = digitalRead(Z_Pin);  //read digital quality of axis Z
-        val_Y = analogRead(A1);      //read analog quality of axis X and Y
-        val_X = analogRead(A2);
+        val_Y = analogRead(A0);      //read analog quality of axis X and Y
+        val_X = analogRead(A1);
         printf("val_X: %d  ,\tval_Y: %d  ,\tval_Z: %d \n",val_X,val_Y,val_Z);
         delay(100);
     }
diff --git a/Code/Python_Code/12.1.1_Joystick/Joystick.py b/Code/Python_Code/12.1.1_Joystick/Joystick.py
index 7dd455e..7509463 100644
--- a/Code/Python_Code/12.1.1_Joystick/Joystick.py
+++ b/Code/Python_Code/12.1.1_Joystick/Joystick.py
@@ -30,8 +30,8 @@ def setup():
 def loop():
     while True:     
         val_Z = GPIO.input(Z_Pin)       #read digital quality of axis Z
-        val_Y = analogRead(1)           #read analog quality of axis X and Y
-        val_X = analogRead(2)
+        val_Y = analogRead(0)           #read analog quality of axis X and Y
+        val_X = analogRead(1)
         print 'value_X: %d ,\tvlue_Y: %d ,\tvalue_Z: %d'%(val_X,val_Y,val_Z)
         time.sleep(0.01)
 
diff --git a/Tutorial.pdf b/Tutorial.pdf
index 106e8a3..fb622b5 100644
Binary files a/Tutorial.pdf and b/Tutorial.pdf differ