diff --git a/README.md b/README.md
index fc7863a..35c2eb6 100644
--- a/README.md
+++ b/README.md
@@ -1,19 +1,13 @@
 # lab02-debugging
 
-# Setup 
+name: Weike Qian
 
-Create a [Shadertoy account](https://www.shadertoy.com/). Either fork this shadertoy, or create a new shadertoy and copy the code from the [Debugging Puzzle](https://www.shadertoy.com/view/flGfRc).
+link: https://www.shadertoy.com/view/3fXBDl
 
-Let's practice debugging! We have a broken shader. It should produce output that looks like this:
-[Unbelievably beautiful shader](https://user-images.githubusercontent.com/1758825/200729570-8e10a37a-345d-4aff-8eff-6baf54a32a40.webm)
+BUGs:
 
-It don't do that. Correct THREE of the FIVE bugs that are messing up the output. You are STRONGLY ENCOURAGED to work with a partner and pair program to force you to talk about your debugging thought process out loud.
-
-Extra credit if you can find all FIVE bugs.
-
-# Submission
-- Create a pull request to this repository
-- In the README, include the names of both your team members
-- In the README, create a link to your shader toy solution with the bugs corrected
-- In the README, describe each bug you found and include a sentence about HOW you found it.
-- Make sure all three of your shadertoys are set to UNLISTED or PUBLIC (so we can see them!)
+ - BUG1: line 97: 'vec' : undeclared identifier                            | HOW: ERROR
+ - BUG2: Wrong Resolution in line 11, should be x / y                      | HOW: see two x
+ - BUG3: Wrong center point, should minus 0.5f with uv                     | HOW: see and seek
+ - BUG4: Wrong marching methods, added steps and maximized mininum step    | HOW: Find error around spheres and seek into marching funcs
+ - BUG5: Wrong shader effects because of wrong reflecting direction        | HOW: Checked for specular and diffuse part of color and divided the steps to find the error