diff --git a/03_map.py b/03_map.py
index cd5d6b8..cd9a2d3 100644
--- a/03_map.py
+++ b/03_map.py
@@ -92,11 +92,15 @@ class Room:
         for x in range(0, self.width):
             tilemap[self.x + x][self.y + self.height - 1] = Level.TILE_WALL
 
+    def center(self):
+        return round(self.x + self.width/2), round(self.y + self.height/2)
+
 
 class Level:
     TILE_WALL = 0
     TILE_ROAD = 1
     TILE_GROUND = 2
+    TILE_HALLWAY = 3
 
     def __init__(self, sizex, sizey, tile_file=None):
         self.sizex, self.sizey = sizex, sizey
@@ -164,11 +168,13 @@ class Level:
         self.tree = self.generate_tree()
 
         # initialize tilemap with road/ground
-        self.tilemap = [[self.TILE_ROAD for y in range(0, self.sizey)] for x in range(0, self.sizex)]
+        self.tilemap = [[self.TILE_GROUND for y in range(0, self.sizey)] for x in range(0, self.sizex)]
 
         # create rooms from partitions
         self.rooms = self.generate_rooms(self.tree[0], self.tilemap, [])
 
+        self.generate_hallways()
+
     def draw_map(self):
         for y in range(0, self.sizey):
             for x in range(0, self.sizex):
@@ -180,6 +186,46 @@ class Level:
                 print(self.tilemap[x][y], end="")
             print("")
 
+    def generate_hallways(self):
+        """ """
+        if len(self.rooms) < 2:
+            # out of luck ?
+            return
+
+        room_a = self.rooms[0]
+        for r in self.rooms[1:]:
+            room_b = r
+            self.generate_hallway(room_a, room_b)
+            room_a = room_b
+
+    def generate_hallway(self, room_a, room_b):
+        """ """
+        print("hallway between room" + str(room_a.id) + " and room " + str(room_b.id))
+        (xa, ya) = room_a.center()
+        (xb, yb) = room_b.center()
+
+        # horizontal part
+        if xa < xb:
+            start_x = xa
+            end_x = xb
+        else:
+            start_x = xb
+            end_x = xa
+        print("h_hw form " + str(start_x) + " and " + str(end_x))
+        for x in range(start_x, end_x):
+            self.tilemap[x][ya] = self.TILE_ROAD
+
+        # vertical part
+        if ya < yb:
+            start_y = ya
+            end_y = yb
+        else:
+            start_y = yb
+            end_y = ya
+        print("v_hw form " + str(start_y) + " and " + str(end_y))
+        for y in range(start_y, end_y):
+            self.tilemap[end_x][y] = self.TILE_ROAD
+
 
 ##
 # main