diff --git a/app/Main.hs b/app/Main.hs
index 122f99f..4e6d195 100644
--- a/app/Main.hs
+++ b/app/Main.hs
@@ -7,8 +7,8 @@ import Data.Map (Map)
 import Data.Map qualified as Map
 import Graphics.Vty
 import System.Environment ( getArgs )
-import System.Directory
-import System.FilePath
+import System.Directory ( listDirectory )
+import System.FilePath ( (</>), takeBaseName )
 
 import Model
 import Rendering ( render )
diff --git a/app/Model.hs b/app/Model.hs
index 453bc61..9e8afab 100644
--- a/app/Model.hs
+++ b/app/Model.hs
@@ -52,26 +52,12 @@ winCondition world =
   where
     coverage = Set.fromList $ map boxLocation $ Map.elems (worldBoxes world)
 
-makeWalls :: [String] -> Array Coord Bool
-makeWalls rows = listArray ((ylo,xlo),(yhi,xhi)) (map (' '/=) (concat rows))
-  where
-    h = length rows
-    w = length (head rows)
-    (xlo,xhi) = mkRange w
-    (ylo,yhi) = mkRange h
-
-mkRange :: Int -> (Int,Int)
-mkRange n = (- (n-1)`div`2, n`div`2)
 
 boxSize :: World -> Box -> Int
 boxSize world box = yhi-ylo+1
   where
     ((ylo,_),(yhi,_)) = bounds (boxWalls world box)
 
-
-solid :: Int -> Array Coord Bool
-solid n = makeWalls (replicate n (replicate n 'x'))
-
 move :: World -> (Int,Int) -> World
 move world dir =
   case moveBlock world Map.empty (myLocation world) dir 0 of