diff --git a/Karto/assignment4/draw.py b/Karto/assignment4/draw.py
index f8ba95d..5a0e1cf 100755
--- a/Karto/assignment4/draw.py
+++ b/Karto/assignment4/draw.py
@@ -1,6 +1,9 @@
 #!/usr/bin/env python3
+import numpy as np
 import matplotlib.pyplot as plt
-from shapely.geometry import LineString
+from shapely.geometry import LineString, asPolygon
+from shapely.coords import CoordinateSequence
+from descartes import PolygonPatch
 
 from measure import *
 
@@ -9,19 +12,23 @@ fig, ax = plt.subplots()
 A08_l = LineString([Points[i].xy for i in [1,2,3] ])
 A08_multiplier = A08_plotis/(L4+L5+L6+L7+L8+L9)
 
-A08_offsetR1 = A08_l.parallel_offset(L6*A08_multiplier, 'right', join_style=2)
-A08_offsetR2 = A08_l.parallel_offset((L6+L5)*A08_multiplier, 'right', join_style=2)
-A08_offsetR3 = A08_l.parallel_offset((L6+L5+L4)*A08_multiplier, 'right', join_style=2)
-A08_offsetL1 = A08_l.parallel_offset(L7*A08_multiplier, 'left', join_style=2)
-A08_offsetL2 = A08_l.parallel_offset((L7+L8)*A08_multiplier, 'left', join_style=2)
-A08_offsetL3 = A08_l.parallel_offset((L7+L8+L9)*A08_multiplier, 'left', join_style=2)
-ax.plot(*A08_l.xy, linewidth=2, dashes=[5,2,2,5], color='red', zorder=KAT3)
-ax.plot(*A08_offsetR1.xy, linewidth=.5, zorder=KAT1, color='black')
-ax.plot(*A08_offsetR2.xy, linewidth=.5, dashes=[5,3], color='lightgreen', zorder=KAT1)
-ax.plot(*A08_offsetR3.xy, linewidth=.5, dashes=[5,3], color='lightgreen', zorder=KAT1)
-ax.plot(*A08_offsetL1.xy, linewidth=.5, zorder=KAT1, color='black')
-ax.plot(*A08_offsetL2.xy, linewidth=.5, dashes=[5,3], color='lightgreen', zorder=KAT1)
-ax.plot(*A08_offsetL3.xy, linewidth=.5, dashes=[5,3], color='lightgreen', zorder=KAT1)
+def offset(width, direction):
+    return A08_l.parallel_offset(width * A08_multiplier, direction, join_style=2)
+offsets = (
+    (offset(L6+L5+L4, 'right'), (5,3), 'lightgreen'),
+    (offset(L6+L5,    'right'), (5,3), 'lightgreen'),
+    (offset(L6,       'right'), (1,0),      'black'),
+    (offset(L7,        'left'), (1,0),      'black'),
+    (offset(L7+L8,     'left'), [5,3], 'lightgreen'),
+    (offset(L7+L8+L9,  'left'), [5,3], 'lightgreen'),
+)
+for line, dashes, color in offsets:
+    ax.plot(*line.xy, linewidth=.5, dashes=dashes, color=color, zorder=KAT1)
+
+A08_poly = np.vstack((offsets[0][0].coords, offsets[-1][0].coords))
+ax.add_patch(PolygonPatch(asPolygon(A08_poly), fc='white', zorder=KAT1, linewidth=0))
+ax.plot(*A08_l.xy, linewidth=2, dashes=[5,2,2,5], color='red', zorder=KAT1)
+
 
 A03_l = LineString([Points[i].xy for i in [11,12,13,14,15,16,17,18] ])
 A03_offsetR = A03_l.parallel_offset(A03_plotis, 'right', join_style=2)