diff --git a/pacmap_rule.txt b/pacmap_rule.txt
index c2d1f32..fab3e12 100644
--- a/pacmap_rule.txt
+++ b/pacmap_rule.txt
@@ -5,5 +5,6 @@ GCF	255	0	255
 WAL	0	0	255
 GSD	0	255	0
 GWL	0	255	255
-TPT	255	0	0
-FIT	255	255	255
+PST	255	255	0   // pacman start tile
+BPD	255	0	0   // big pac-dot
+PDT	255	255	255 // small pac-dot
diff --git a/src/pacmap.py b/src/pacmap.py
index 99a9acf..2ca17ef 100755
--- a/src/pacmap.py
+++ b/src/pacmap.py
@@ -56,9 +56,10 @@ class Map:
         2: big pac-dot
         """
         self._surf = pygame.Surface((Map.width * 20, Map.height * 20))
+        self._dot_surf = pygame.Surface((Map.width * 20, Map.height * 20))
         if maze_img_file and os.path.isfile(maze_img_file):
             try:
-                self.phys_map = self.decode_map(maze_img_file)
+                self.decode_map(maze_img_file)
             except Exception as e:
                 raise e
         else:
@@ -185,6 +186,8 @@ class Map:
 
     def draw(self, surf):
         surf.blit(self._surf, (0, 0))
+        self._dot_surf.fill()
+    
 
     def decode_map(self, img_file):
         img = Image.open(img_file)
@@ -194,22 +197,36 @@ class Map:
             (0  ,   0, 255): PhysTile.WAL,
             (0  , 255,   0): PhysTile.GSD,
             (0  , 255, 255): PhysTile.GWL,
-            (255,   0,   0): PhysTile.TPT,
-            (255, 255,   0): PhysTile.FIT,
+            (255,   0,   0): DotTile.BPD,
+            (255, 255,   0): "pacstart",
+            (255, 255, 255): DotTile.SPD
         }
         data = list(img.getdata())
-        matrix = []
+        self.phys_map, self.dots_map = [], []
         for row in range(img.height):
-            matrix.append([])
+            self.phys_map.append([])
+            self.dots_map.append([])
             for col in range(img.width):
                 try:
                     color = data[col + row*img.width][:3]
                     tile = dictionnary[color] # avoid alpha component
+                    if isinstance(tile, PhysTile):
+                        self.phys_map[-1].append(tile)
+                        self.dots_map[-1].append(DotTile.NDT)
+                        if tile not in (PhysTile.WAL, PhysTile.GCF, PhysTile.GSD, PhysTile.GWL):
+                            color = (0, 0, 0) # everything else is ground visually
+                    elif isinstance(tile, DotTile):
+                        self.phys_map[-1].append(PhysTile.GRD)
+                        self.dots_map[-1].append(tile)
+                        color = (0, 0, 0)
+                    else: # pacstart
+                        self.phys_map[-1].append(PhysTile.GRD)
+                        self.dots_map[-1].append(DotTile.NDT)
+                        self.pac_start = (len(self.phys_map), len(self.phys_map[-1]))
+                        color = (0, 0, 0)
                     self._surf.fill(color, pygame.Rect(col*20, row*20, 20, 20))
                 except:
                     raise ValueError("Pixel " + str(col) + "," + str(row) + " is invalid")
-                matrix[-1].append(tile)
-        return matrix