diff --git a/main.py b/main.py
index d6c013a..de1d4f4 100644
--- a/main.py
+++ b/main.py
@@ -45,7 +45,7 @@ def to_iso(tile_list):
     col = tile.center_x//TILE_WIDTH
     row = tile.center_y//TILE_HEIGHT
     tile.center_x = tile.center_x - TILE_WIDTH//2 * (col-row)
-    tile.center_y = tile.center_y - TILE_HEIGHT//2 * (row+col)
+    tile.center_y = tile.center_y - TILE_HEIGHT//2 * (col+row)
   return tile_list
 
 class Player(arcade.Sprite):
@@ -118,15 +118,15 @@ class MainView(arcade.View):
     #self.enemys.update(delta_time)
   def on_mouse_press(self,x,y,but,mod):
     world_point = self.camera.unproject((x,y))
-    tile_col = world_point.x//TILE_WIDTH
-    tile_row = world_point.y//TILE_HEIGHT
+    tile_col = world_point.x/TILE_WIDTH
+    tile_row = world_point.y/TILE_HEIGHT
     sheet = arcade.load_spritesheet('./assets/tiles/64x64.png')
     textures = sheet.get_texture_grid((64,64),16,184)
     self.walls.append(
       arcade.Sprite(
         textures[165],
-        center_x=tile_col*TILE_WIDTH + TILE_WIDTH//2,
-        center_y=tile_row*TILE_HEIGHT+TILE_HEIGHT
+        center_x=world_point.x - world_point.x%(TILE_WIDTH//2),
+        center_y=world_point.y - world_point.y%(TILE_HEIGHT//2)
       )
     )
   def on_key_press(self,key,mod):