diff --git a/src/Dodge/BlBl.hs b/src/Dodge/BlBl.hs
new file mode 100644
index 000000000..74cfdc5a3
--- /dev/null
+++ b/src/Dodge/BlBl.hs
@@ -0,0 +1,9 @@
+module Dodge.BlBl (doBlBl) where
+
+import Dodge.Data.BlBl
+
+doBlBl :: BlBl -> Bool -> Bool
+doBlBl bb = case bb of
+    BlNegate -> not
+    BlConst bl -> const bl
+    BlId -> id
diff --git a/src/Dodge/Data/BlBl.hs b/src/Dodge/Data/BlBl.hs
new file mode 100644
index 000000000..459b48b84
--- /dev/null
+++ b/src/Dodge/Data/BlBl.hs
@@ -0,0 +1,17 @@
+{-# LANGUAGE DeriveAnyClass #-}
+{-# LANGUAGE DeriveGeneric #-}
+{-# LANGUAGE StrictData #-}
+{-# LANGUAGE TemplateHaskell #-}
+
+module Dodge.Data.BlBl where
+
+import Data.Aeson
+import Data.Aeson.TH
+
+data BlBl
+    = BlNegate
+    | BlConst Bool
+    | BlId
+    deriving (Eq, Ord, Show, Read) --Generic, Flat)
+
+deriveJSON defaultOptions ''BlBl
diff --git a/src/Dodge/Data/Wall/Structure.hs b/src/Dodge/Data/Wall/Structure.hs
new file mode 100644
index 000000000..56de8e4eb
--- /dev/null
+++ b/src/Dodge/Data/Wall/Structure.hs
@@ -0,0 +1,21 @@
+{-# LANGUAGE DeriveGeneric #-}
+{-# LANGUAGE DeriveAnyClass #-}
+{-# LANGUAGE StrictData #-}
+{-# LANGUAGE TemplateHaskell #-}
+
+module Dodge.Data.Wall.Structure
+ where
+import Control.Lens
+import Data.Aeson
+import Data.Aeson.TH
+
+data WallStructure
+    = StandaloneWall
+    | DoorPart {_wsDoor :: Int}
+    | MachinePart {_wsMachine :: Int}
+    | BlockPart {_wsBlock :: Int}
+    | CreaturePart { _wlStCreature :: Int }
+    deriving (Eq, Ord, Show, Read) --Generic, Flat)
+
+makeLenses ''WallStructure
+deriveJSON defaultOptions ''WallStructure
diff --git a/src/Dodge/SelectedClose.hs b/src/Dodge/SelectedClose.hs
new file mode 100644
index 000000000..9e396108e
--- /dev/null
+++ b/src/Dodge/SelectedClose.hs
@@ -0,0 +1,25 @@
+module Dodge.SelectedClose (getSelectedCloseObj,interactWithCloseObj) where
+
+import Dodge.Button.Event
+import Dodge.Inventory.Add
+import Control.Lens
+import Dodge.Data.World
+import NewInt
+
+interactWithCloseObj :: Either FloorItem Button -> World -> World
+interactWithCloseObj e w = worldEventFlags . at InventoryChange ?~ () $ case e of
+    (Left flit) -> pickUpItem 0 flit w
+    (Right but) -> doButtonEvent (_btEvent but) but w
+
+
+getSelectedCloseObj :: World -> Maybe (Either FloorItem Button)
+getSelectedCloseObj w = do
+    (i, j, _) <- w ^? hud . hudElement . diSelection . _Just
+    case i of
+        3 -> do
+            NInt k <- w ^? hud . closeItems . ix j
+            fmap Left $ w ^? cWorld . lWorld . floorItems . unNIntMap . ix k
+        5 -> do
+            k <- w ^? hud . closeButtons . ix j
+            fmap Right $ w ^? cWorld . lWorld . buttons . ix k
+        _ -> Nothing