diff --git a/astar.py b/astar.py
index 802abe5..f0d9603 100644
--- a/astar.py
+++ b/astar.py
@@ -57,8 +57,13 @@ def _is_occupied(self,cell_coord):
             return False
 
     def _add_swamp(self, mouse_pos):
-        #insert swamp code here.
-        pass
+        swamp_coord = (mouse_pos[0]/50, mouse_pos[1]/50)
+        if self._is_occupied(swamp_coord):
+            if self.actors[swamp_coord].unremovable == False:
+                self.actors.pop(swamp_coord, None)
+        else:
+            self.actors[swamp_coord] = ObstacleTile( swamp_coord, self, './images/swamp.jpg', is_unpassable = False, terrain_cost = 3)
+
 
     def _add_lava(self, mouse_pos):
         lava_coord = (mouse_pos[0]/50, mouse_pos[1]/50)
@@ -91,14 +96,16 @@ def main_loop(self):
                 elif event.type is pygame.MOUSEBUTTONDOWN:
                     if self.add_tile_type == 'lava':
                         self._add_lava(event.pos)
-                    #insert swamp code here
+                    elif self.add_tile_type == 'swamp':
+                        self._add_swamp(event.pos)
                 elif event.type is pygame.KEYDOWN:
                     if event.key == pygame.K_SPACE:
                         self.paul.run_astar(self.cake.cell_coordinates, self)
                         self.paul.get_path()
                     elif event.key == pygame.K_l:
                         self.add_tile_type = 'lava'
-                    #insert swamp code here
+                    elif event.key == pygame.K_s:
+                        self.add_tile_type = 'swamp'
 
 class Actor(object):
     def __init__(self, cell_coordinates, world, image_loc, unremovable = False, is_obstacle = True):
@@ -142,8 +149,8 @@ def f_cost(self):
         return self.g_cost + self.h_cost
 
     def draw(self):
-        COST_TO_DRAW = ''
-        #COST_TO_DRAW = self.g_cost
+        #COST_TO_DRAW = ''
+        COST_TO_DRAW = self.g_cost
         #COST_TO_DRAW = self.h_cost
         #COST_TO_DRAW = self.f_cost
         line_width = 2
@@ -167,12 +174,13 @@ def get_h_cost(self, coord_a,coord_b):
     def get_open_adj_coords(self, coords):
         """returns list of valid coords that are adjacent to the argument, open, and not in the closed list."""
         #modify directions and costs as needed
-        directions = [(1,0),(0,1),(-1,0),(0,-1)]
-        costs = [1,1,1,1]
+        directions = [(1,0),(0,1),(-1,0),(0,-1),(1,1),(1,-1),(-1,-1),(-1,1),(2,0),(0,2),(-2,0),(0,-2)]
+        costs = [1,1,1,1,3,3,3,3,8,8,8,8]
         adj_coords = map(lambda d: self.world._add_coords(coords,d), directions)
         for i, coord in enumerate(adj_coords):
             costs[i] += self.world.get_terrain_cost(coord)
         in_bounds = [self.world._is_in_grid(c) and not self.world._is_occupied(c) and c not in self.closed_list for c in adj_coords]
+        
         adj_coords = [c for (idx,c) in enumerate(adj_coords) if in_bounds[idx]]
         costs = [c for (idx,c) in enumerate(costs) if in_bounds[idx]]
         return adj_coords, costs
diff --git a/writeup.pdf b/writeup.pdf
new file mode 100644
index 0000000..0b3b231
Binary files /dev/null and b/writeup.pdf differ