diff --git a/src/gui.py b/src/gui.py
--- a/src/gui.py
+++ b/src/gui.py
@@ -20,7 +20,8 @@ class Application(tk.Frame):
     # a captured frame with overlay graphics
     self.imgView=tk.Canvas(self)
     self.imgView.configure(width=480,height=360)
-    imgOrig=PIL.Image.open("../images/1.jpg")
+    imgOrig=PIL.Image.open("../images/7.jpg")
+    
     self.img=ImageTk.PhotoImage(imgOrig.resize((int(self.imgView['width']),int(self.imgView['height'])),resample=PIL.Image.BILINEAR))
     
     self.imgView.bind('<1>',lambda e: self.addCorner(e.x,e.y))
@@ -46,6 +47,16 @@ class Application(tk.Frame):
     for corner in self.corners.corners:
       self.markPoint(corner.x,corner.y)
     
+    if self.boardGrid!=None:
+      for r in range(19):
+        a=self.boardGrid.intersections[r][0]
+        b=self.boardGrid.intersections[r][-1]
+        self.imgView.create_line(a.x,a.y,b.x,b.y,fill='#00ff00')
+      for c in range(19):
+        a=self.boardGrid.intersections[0][c]
+        b=self.boardGrid.intersections[-1][c]
+        self.imgView.create_line(a.x,a.y,b.x,b.y,fill='#00ff00')
+    
     self.imgView.grid()
     
   ## Marks a point at the image with a green cross. Used for corners.