diff --git a/bin/tools.py b/bin/tools.py
index 591d75d..2e6116e 100644
--- a/bin/tools.py
+++ b/bin/tools.py
@@ -56,6 +56,7 @@ def log_level(level):
 def C_R_P(position, degrees): # stand for calculation
     """
     very thanks for lenny from pyglet delvoper
+    https://github.com/LennyPhoenix
     this part of code is write by him
     """
     radians = degrees * (math.pi / 180)
diff --git a/tests/many_test_of_hitbox.py b/tests/many_test_of_hitbox.py
index 2a08f10..2b8690a 100644
--- a/tests/many_test_of_hitbox.py
+++ b/tests/many_test_of_hitbox.py
@@ -1,4 +1,10 @@
 
+"""
+这个测试主要是为了测试关于旋转的按钮碰撞箱判定的
+感谢孙老师/
+（下周就要学一次函数了
+"""
+
 import turtle
 import random