diff --git a/drawing.py b/drawing.py
index 29fc89e..c0aa56b 100644
--- a/drawing.py
+++ b/drawing.py
@@ -1,7 +1,32 @@
 # drawing.py
 # ----------
-# By ____(you)___________
+# By Seoyeon___________
 #
-# (Briefly describe what this program does.)
+# (basic practice prior to yin-yang shape.)
 
 from turtle import *
+color("black", "red")
+begin_fill()
+forward(40)
+right(90)
+forward(20)
+right(90)
+forward(40)
+right(90)
+forward(20)
+end_fill()
+
+penup()
+backward(20)
+right(180)
+color("black","blue")
+begin_fill()
+forward(20)
+left(90)
+forward(40)
+left(90)
+forward(20)
+end_fill()
+
+input()
+