diff --git a/Diagonal.png b/Diagonal.png
new file mode 100644
index 0000000..69b524d
Binary files /dev/null and b/Diagonal.png differ
diff --git a/Hop.png b/Hop.png
new file mode 100644
index 0000000..8cc47a8
Binary files /dev/null and b/Hop.png differ
diff --git a/astar.py b/astar.py
index 802abe5..1252c48 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)
+            self.actors[swamp_coord].is_obstacle = True
 
     def _add_lava(self, mouse_pos):
         lava_coord = (mouse_pos[0]/50, mouse_pos[1]/50)
@@ -66,7 +71,7 @@ def _add_lava(self, mouse_pos):
             if self.actors[lava_coord].unremovable == False:
                 self.actors.pop(lava_coord, None)
         else:
-            self.actors[lava_coord] = ObstacleTile( lava_coord, self, './images/lava.jpg', is_unpassable = True, terrain_cost = 0)
+            self.actors[lava_coord] = ObstacleTile(lava_coord, self, './images/lava.jpg', is_unpassable = True, terrain_cost = 0)
 
     def get_terrain_cost(self, cell_coord):
         try:
@@ -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
+                    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):
@@ -167,8 +174,8 @@ 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),(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)