diff --git a/AI Explanations.odt b/AI Explanations.odt
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index 0000000..edd86ed
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diff --git a/Diagonals.png b/Diagonals.png
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index 0000000..007d994
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diff --git a/Jump_Lava.png b/Jump_Lava.png
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index 0000000..919d918
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diff --git a/Swamp.png b/Swamp.png
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index 0000000..4af365f
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diff --git a/astar.py b/astar.py
index 802abe5..97a6934 100644
--- a/astar.py
+++ b/astar.py
@@ -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):
@@ -143,7 +149,7 @@ def f_cost(self):
 
     def draw(self):
         COST_TO_DRAW = ''
-        #COST_TO_DRAW = self.g_cost
+        COST_TO_DRAW = self.g_cost
         #COST_TO_DRAW = self.h_cost
         #COST_TO_DRAW = self.f_cost
         line_width = 2
@@ -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), (-2,0), (0,2), (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)
diff --git a/f_cost.png b/f_cost.png
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index 0000000..9bcd65b
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diff --git a/g_cost.png b/g_cost.png
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index 0000000..d2d17ee
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diff --git a/h_cost.png b/h_cost.png
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