diff --git a/drawing.py b/drawing.py
index c0aa56b..c880ed2 100644
--- a/drawing.py
+++ b/drawing.py
@@ -2,31 +2,26 @@
 # ----------
 # By Seoyeon___________
 #
-# (basic practice prior to yin-yang shape.)
+# (center of Korean flag with two colors, red and blue)
 
-from turtle import *
+from turtle import * 
+r=40
+left(70)
 color("black", "red")
 begin_fill()
-forward(40)
-right(90)
-forward(20)
-right(90)
-forward(40)
-right(90)
-forward(20)
+circle(r,180)  # half circle
+circle(-r,180)  # another half circle
+circle(-r*2,180)
 end_fill()
 
-penup()
-backward(20)
-right(180)
-color("black","blue")
+color("black", "blue")
 begin_fill()
-forward(20)
-left(90)
-forward(40)
-left(90)
-forward(20)
-end_fill()
+circle(-r*2,180)
+right(180)
+circle(r,180)  # half circle
+circle(-r,180)  # another half circle
 
+end_fill()
 input()
 
+