Update README.md

README.md

@@ -15,7 +15,7 @@ There are 3 steps in this tutorial.
 ## Step 0. Before we start! You have to prepare...
 
 In this part, I'll show a example code of self-rotating 3d cube and a example output of it.\
-[](https://git.ajou.ac.kr/Jiyoung_Moon/mouse-drag-for-transform-camera/-/blob/master/self-rotating-cube.gif)\
+[](https://git.ajou.ac.kr/Jiyoung_Moon/mouse-drag-for-transform-camera/-/raw/master/script_step1_output.PNG)
 This code is used for the next steps.
 
 ## Step 1. Remove some codes.