diff --git a/dotscape b/dotscape
index 3b37518..1da63a3 100755
Binary files a/dotscape and b/dotscape differ
diff --git a/functional-core/app/app-init.sml b/functional-core/app/app-init.sml
index ca9856e..d37ab10 100644
--- a/functional-core/app/app-init.sml
+++ b/functional-core/app/app-init.sml
@@ -35,6 +35,8 @@ struct
       , showGraph = true
       , arrowX = 0
       , arrowY = 0
+      , openFilePath = ""
+      , fileBrowser = Vector.fromList []
       }
     end
 
diff --git a/functional-core/app/app-type.sml b/functional-core/app/app-type.sml
index 438d399..c19618f 100644
--- a/functional-core/app/app-type.sml
+++ b/functional-core/app/app-type.sml
@@ -1,6 +1,8 @@
 signature APP_TYPE =
 sig
-  datatype app_mode = NORMAL_MODE | SAVE_MODE
+  datatype app_mode = NORMAL_MODE | BROWSE_MODE
+
+  datatype file_browser_item = FILE of string | FOLDER of string
 
   datatype triangle_stage =
     NO_TRIANGLE
@@ -33,12 +35,16 @@ sig
     , mouseY: Real32.real
     , arrowX: int
     , arrowY: int
+    , openFilePath: string
+    , fileBrowser: file_browser_item vector
     }
 end
 
 structure AppType :> APP_TYPE =
 struct
-  datatype app_mode = NORMAL_MODE | SAVE_MODE
+  datatype app_mode = NORMAL_MODE | BROWSE_MODE
+
+  datatype file_browser_item = FILE of string | FOLDER of string
 
   type triangle =
     { x1: Real32.real
@@ -79,5 +85,7 @@ struct
     , mouseY: Real32.real
     , arrowX: int
     , arrowY: int
+    , openFilePath: string
+    , fileBrowser: file_browser_item vector
     }
 end
diff --git a/functional-core/app/app-update.sml b/functional-core/app/app-update.sml
index 381e5d8..be26386 100644
--- a/functional-core/app/app-update.sml
+++ b/functional-core/app/app-update.sml
@@ -355,7 +355,7 @@ struct
 
   fun trianglesLoadError model = (model, NO_MAILBOX)
 
-  fun update (model: app_type, inputMsg) =
+  fun updateNormalMode (model: app_type, inputMsg) =
     case inputMsg of
       MOUSE_MOVE {x = mouseX, y = mouseY} =>
         let val model = AppWith.mousePosition (model, mouseX, mouseY)
@@ -378,4 +378,7 @@ struct
     | KEY_SPACE => enterOrSpaceCoordinates model
     | USE_TRIANGLES triangles => useTriangles (model, triangles)
     | TRIANGLES_LOAD_ERROR => trianglesLoadError model
+
+  fun update (model: app_type, inputMsg) =
+    case #mode model of NORMAL_MODE => updateNormalMode (model, inputMsg)
 end
diff --git a/functional-core/app/app-with.sml b/functional-core/app/app-with.sml
index ce712f7..18489e8 100644
--- a/functional-core/app/app-with.sml
+++ b/functional-core/app/app-with.sml
@@ -78,6 +78,8 @@ struct
         , mouseY
         , arrowX = _
         , arrowY = _
+        , openFilePath
+        , fileBrowser
         } = app
 
       val newUndo = newUndoHd :: undo
@@ -97,6 +99,8 @@ struct
       , mouseY = mouseY
       , arrowX = arrowX
       , arrowY = arrowY
+      , openFilePath = openFilePath
+      , fileBrowser = fileBrowser
       }
     end
 
@@ -120,6 +124,8 @@ struct
         , mouseY
         , arrowX = _
         , arrowY = _
+        , openFilePath
+        , fileBrowser
         } = app
 
       val newTriangle = {x1 = x1, y1 = y1, x2 = x2, y2 = y2, x3 = x3, y3 = y3}
@@ -141,6 +147,8 @@ struct
       , mouseY = mouseY
       , arrowX = arrowX
       , arrowY = arrowY
+      , openFilePath = openFilePath
+      , fileBrowser = fileBrowser
       }
     end
 
@@ -162,6 +170,8 @@ struct
         , mouseY
         , arrowX = _
         , arrowY
+        , openFilePath
+        , fileBrowser
         } = app
     in
       { mode = mode
@@ -179,6 +189,8 @@ struct
       , mouseY = mouseY
       , arrowX = arrowX
       , arrowY = arrowY
+      , openFilePath = openFilePath
+      , fileBrowser = fileBrowser
       }
     end
 
@@ -200,6 +212,8 @@ struct
         , mouseY
         , arrowX
         , arrowY = _
+        , openFilePath
+        , fileBrowser
         } = app
     in
       { mode = mode
@@ -217,6 +231,8 @@ struct
       , mouseY = mouseY
       , arrowX = arrowX
       , arrowY = arrowY
+      , openFilePath = openFilePath
+      , fileBrowser = fileBrowser
       }
     end
 
@@ -240,6 +256,8 @@ struct
         , mouseY
         , arrowX
         , arrowY
+        , openFilePath
+        , fileBrowser
         } = app
 
       val xClickPoints = ClickPoints.generate (wStart, wFinish, numClickPoints)
@@ -260,6 +278,8 @@ struct
       , mouseY = mouseY
       , arrowX = arrowX
       , arrowY = arrowY
+      , openFilePath = openFilePath
+      , fileBrowser = fileBrowser
       }
     end
 
@@ -304,6 +324,8 @@ struct
         , showGraph
         , arrowX
         , arrowY
+        , openFilePath
+        , fileBrowser
         } = app
     in
       { mode = mode
@@ -321,6 +343,8 @@ struct
       , showGraph = showGraph
       , arrowX = arrowX
       , arrowY = arrowY
+      , openFilePath = openFilePath
+      , fileBrowser = fileBrowser
       }
     end
 
@@ -343,6 +367,8 @@ struct
         , mouseY
         , arrowX
         , arrowY
+        , openFilePath
+        , fileBrowser
         } = app
 
       val newUndo =
@@ -367,6 +393,8 @@ struct
       , mouseY = mouseY
       , arrowX = arrowX
       , arrowY = arrowY
+      , openFilePath = openFilePath
+      , fileBrowser = fileBrowser
       }
     end
 
@@ -389,6 +417,8 @@ struct
         , mouseY
         , arrowX
         , arrowY
+        , openFilePath
+        , fileBrowser
         } = app
 
       val newUndo = newUndoHd :: undo
@@ -412,6 +442,8 @@ struct
       , mouseY = mouseY
       , arrowX = arrowX
       , arrowY = arrowY
+      , openFilePath = openFilePath
+      , fileBrowser = fileBrowser
       }
     end
 
@@ -433,6 +465,8 @@ struct
         , arrowX
         , arrowY
         , showGraph = _
+        , openFilePath
+        , fileBrowser
         } = app
     in
       { mode = mode
@@ -450,6 +484,8 @@ struct
       , mouseY = mouseY
       , arrowX = arrowX
       , arrowY = arrowY
+      , openFilePath = openFilePath
+      , fileBrowser = fileBrowser
       }
     end
 
@@ -471,6 +507,8 @@ struct
         , arrowY
         , triangles = _
         , triangleStage = _
+        , openFilePath
+        , fileBrowser
         } = app
 
       val triangleStage = NO_TRIANGLE
@@ -490,6 +528,8 @@ struct
       , mouseY = mouseY
       , arrowX = arrowX
       , arrowY = arrowY
+      , openFilePath = openFilePath
+      , fileBrowser = fileBrowser
       }
     end
 end
diff --git a/imperative-shell/file-thread.sml b/imperative-shell/file-thread.sml
index 5551cb8..a3df583 100644
--- a/imperative-shell/file-thread.sml
+++ b/imperative-shell/file-thread.sml
@@ -18,28 +18,26 @@ struct
     let
       val num = (num + 1.0) / 2.0
       val num = Real32.toString num
-      val num = 
+      val num =
         (* Problem: It seems that Real32.toString may sometimes return a string
          * that is recognised as an integer, like "1" instead of "1.0".
          * If that happens, we just add a ".0" to the end 
          * so it's recognised as a real. *)
-        if String.isSubstring "." num 
-        then num 
+        if String.isSubstring "." num then num
         else num ^ ".0"
     in
-      "      (((startX * (1.0 - " ^ num ^ ")) + (endX * " ^ num ^ ")) / windowWidth) - 1.0"
+      "      (((startX * (1.0 - " ^ num ^ ")) + (endX * " ^ num
+      ^ ")) / windowWidth) - 1.0"
     end
 
   fun ndcToLerpY num =
     let
       val num = (num + 1.0) / 2.0
       val num = Real32.toString num
-      val num = 
-        if String.isSubstring "." num 
-        then num 
-        else num ^ ".0"
+      val num = if String.isSubstring "." num then num else num ^ ".0"
     in
-      "      (((startY * (1.0 - " ^ num ^ ")) + (endY * " ^ num ^ ")) / windowHeight) - 1.0"
+      "      (((startY * (1.0 - " ^ num ^ ")) + (endY * " ^ num
+      ^ ")) / windowHeight) - 1.0"
     end
 
   fun helpExportTriangles (io, triangles) =
@@ -55,10 +53,20 @@ struct
           val y3 = ndcToLerpY y3
 
           val line = String.concat
-            [ x1, ",\n", y1, ", r, g, b,\n"
-            , x2, ",\n", y2, ", r, g, b,\n"
-            , x3, ",\n", y3
-            , case tl of [] => ", r, g, b\n" | _ => ", r, g, b,\n"
+            [ x1
+            , ",\n"
+            , y1
+            , ", r, g, b,\n"
+            , x2
+            , ",\n"
+            , y2
+            , ", r, g, b,\n"
+            , x3
+            , ",\n"
+            , y3
+            , case tl of
+                [] => ", r, g, b\n"
+              | _ => ", r, g, b,\n"
             ]
 
           val _ = TextIO.output (io, line)
@@ -128,14 +136,20 @@ struct
       {x1, y1, x2, y2, x3, y3} :: tl =>
         let
           val triString = String.concat
-            [ "x ", Real32.toString x1
-            , " y ", Real32.toString y1
+            [ "x "
+            , Real32.toString x1
+            , " y "
+            , Real32.toString y1
 
-            , " x ", Real32.toString x2
-            , " y ", Real32.toString y2
+            , " x "
+            , Real32.toString x2
+            , " y "
+            , Real32.toString y2
 
-            , " x ", Real32.toString x3
-            , " y ", Real32.toString y3
+            , " x "
+            , Real32.toString x3
+            , " y "
+            , Real32.toString y3
             , "\n"
             ]
 
@@ -154,6 +168,30 @@ struct
       ()
     end
 
+  fun getDirList (dir, acc) =
+    case OS.FileSys.readDir dir of
+      SOME path =>
+        let
+          val _ = print (path ^ "\n")
+          val acc =
+            if OS.FileSys.isDir path then (AppType.FOLDER path) :: acc
+            else if OS.FileSys.isLink path then acc
+            else (AppType.FILE path) :: acc
+        in
+          getDirList (dir, acc)
+        end
+    | NONE => let val acc = List.rev acc in Vector.fromList acc end
+
+  fun loadFiles (path, inputMailbox) =
+    let
+      val path = if String.size path = 0 then OS.FileSys.getDir () else path
+      val dir = OS.FileSys.openDir path
+      val dirList = getDirList (dir, [])
+      val _ = OS.FileSys.closeDir dir
+    in
+      ()
+    end
+
   fun run (fileMailbox, inputMailbox) =
     let
       val _ =
@@ -161,6 +199,7 @@ struct
           SAVE_TRIANGLES triangles => saveTriangles triangles
         | LOAD_TRIANGLES => loadTriangles inputMailbox
         | EXPORT_TRIANGLES triangles => exportTriangles triangles
+        | LOAD_FILES path => loadFiles (path, inputMailbox)
     in
       run (fileMailbox, inputMailbox)
     end
diff --git a/message-types/file-msg.sml b/message-types/file-msg.sml
index 963f7ab..2c71251 100644
--- a/message-types/file-msg.sml
+++ b/message-types/file-msg.sml
@@ -4,6 +4,7 @@ sig
     SAVE_TRIANGLES of AppType.triangle list
   | LOAD_TRIANGLES
   | EXPORT_TRIANGLES of AppType.triangle list
+  | LOAD_FILES of string
 end
 
 structure FileMessage :> FILE_MESSAGE =
@@ -12,4 +13,5 @@ struct
     SAVE_TRIANGLES of AppType.triangle list
   | LOAD_TRIANGLES
   | EXPORT_TRIANGLES of AppType.triangle list
+  | LOAD_FILES of string
 end