diff --git a/astar.py b/astar.py
index 802abe5..ec42448 100644
--- a/astar.py
+++ b/astar.py
@@ -25,7 +25,7 @@ def _init_cells(self):
         for i in range(self.height):
             for j in range(self.width):
                 self.cells[(i,j)] = Cell(self.screen,(i*self.cell_size, j*self.cell_size),(self.cell_size,self.cell_size))
-    
+
     def _add_coords(self,a,b):
         return tuple(map(sum,zip(a,b)))
 
@@ -57,8 +57,12 @@ 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 +95,16 @@ 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
+                    if 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):
@@ -125,7 +131,7 @@ class ObstacleTile(Actor):
     def __init__(self, cell_coordinates, world, image_loc, terrain_cost=0, is_unpassable = True):
         super(ObstacleTile, self).__init__(cell_coordinates, world, image_loc, unremovable = False, is_obstacle = is_unpassable)
         self.terrain_cost = terrain_cost
-        
+
 class Cell():
     def __init__(self, draw_screen, coordinates, dimensions):
         self.draw_screen = draw_screen
@@ -167,8 +173,8 @@ 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),(-2,0)]
+        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)
@@ -226,7 +232,7 @@ def run_astar(self, destination_coord, world):
             walkable_open_coords, costs = self.get_open_adj_coords(coord_s)
             for idx,coord in enumerate(walkable_open_coords):
                 cell = self.cells[coord]
-                g_cost = cell_s.g_cost + costs[idx] 
+                g_cost = cell_s.g_cost + costs[idx]
                 h_cost = self.get_h_cost(coord, destination_coord)
                 f_cost = g_cost + h_cost
                 if coord in self.open_list:
diff --git a/finished.pdf b/finished.pdf
new file mode 100644
index 0000000..799dfeb
Binary files /dev/null and b/finished.pdf differ