diff --git a/lib/colors.dart b/lib/colors.dart
new file mode 100644
index 0000000..b78fab6
--- /dev/null
+++ b/lib/colors.dart
@@ -0,0 +1,6 @@
+import 'package:flutter/material.dart';
+
+class Palette {
+  static const defaultBg = Colors.black;
+  static const defaultFg = Colors.white;
+}
diff --git a/lib/main.dart b/lib/main.dart
index 1348cc4..2b908d1 100644
--- a/lib/main.dart
+++ b/lib/main.dart
@@ -1,3 +1,4 @@
+import 'package:dartterm/colors.dart';
 import 'package:dartterm/terminal.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/scheduler.dart';
@@ -14,9 +15,7 @@ class App extends StatelessWidget {
     return MaterialApp(
       title: 'DARTTERM',
       theme: ThemeData(
-        colorScheme: ColorScheme.fromSeed(seedColor: Colors.red),
-        useMaterial3: true,
-      ),
+          useMaterial3: true, scaffoldBackgroundColor: Palette.defaultBg),
       builder: (BuildContext context, Widget? child) {
         return MediaQuery(
             data: MediaQuery.of(context).copyWith(textScaleFactor: 1.0),
@@ -46,10 +45,11 @@ class _ViewerState extends State<Viewer> {
 
   @override
   Widget build(BuildContext context) {
-    return Center(
-      child:
-          AspectRatio(aspectRatio: 16 / 9.0, child: terminal.toWidget(context)),
-    );
+    return Scaffold(
+        body: Center(
+      child: AspectRatio(
+          aspectRatio: width / height, child: terminal.toWidget(context)),
+    ));
   }
 
   void tick(Duration elapsed) {
diff --git a/lib/terminal.dart b/lib/terminal.dart
index 818305b..c04425e 100644
--- a/lib/terminal.dart
+++ b/lib/terminal.dart
@@ -1,11 +1,12 @@
+import 'package:dartterm/colors.dart';
 import 'package:dartterm/cp437.dart';
 import 'package:dartterm/fonts.dart';
 import 'package:dartterm/terminal_painter.dart';
 import 'package:flutter/material.dart';
 
 class Terminal {
-  static const int width = 96;
-  static const int height = 54;
+  static const int width = 60;
+  static const int height = 32;
   static const int cellW = 64;
   static const int cellH = 64;
   static const int nTiles = width * height;
@@ -74,7 +75,7 @@ class Tile {
 
   Tile(this.content, this.bg, this.fg);
 
-  static Tile empty() => Tile(null, Colors.black, Colors.white);
+  static Tile empty() => Tile(null, Palette.defaultBg, Palette.defaultFg);
 }
 
 class Content {
diff --git a/lib/terminal_painter.dart b/lib/terminal_painter.dart
index 5fc7681..ca7f532 100644
--- a/lib/terminal_painter.dart
+++ b/lib/terminal_painter.dart
@@ -139,6 +139,9 @@ class ImageTodos {
   void add(Rect src, Rect dst, Color color) {
     // NOTE: Because main.dart uses aspectRatio, scaleX and scaleY should be close to the same
     var scaleX = dst.width / src.width;
+    // dst.width / src.width;
+    // log("scaleX: $scaleX ($dstWidth, $srcWidth)");
+    // var scaleY = dst.height / src.height;
 
     transforms.add(RSTransform.fromComponents(
       rotation: 0.0,