diff --git a/bingo.py b/bingo.py
index 6b5a05b..e3bd527 100644
--- a/bingo.py
+++ b/bingo.py
@@ -1,10 +1,10 @@
 #!/usr/bin/env python3
 
 from textual.app import App, ComposeResult
-from textual.widgets import Header, Footer, Button, Label, Switch, Static
-from textual.containers import ScrollableContainer
+from textual.widgets import Header, Footer, Input, Label, Static, Button
 from textual.message import Message
 from textual.color import Color
+from textual.containers import Horizontal
 
 from asyncio import sleep
 
@@ -51,11 +51,40 @@ class BingoField(Static):
         return str(self.text)
 
 class BingoApp(App):
-    """A Textual app to manage stopwatches."""
+    """A Textual app to run a Bingo board."""
     CSS_PATH = "bingo.tcss"
 
     BINDINGS = [("d", "toggle_dark", "Toggle dark mode")]
 
+    def compose(self) -> ComposeResult:
+        """Create child widgets for the app."""
+        yield Header()
+        yield BingoDisplay()
+        yield Footer()
+
+    def action_toggle_dark(self) -> None:
+        """An action to toggle dark mode."""
+        self.dark = not self.dark
+
+class BingoDisplay(Static):
+    def compose(self) -> ComposeResult:
+        """Create child widgets for the app."""
+        yield BingoBoard()
+        input_field = Input(
+                type='integer',
+                placeholder='UNIX timestamp',
+                max_length=10,
+                classes='seed_input'
+        )
+        input_field.border_title = 'Seed'
+        yield Horizontal(
+            input_field,
+            Button('re-roll', classes='roll_btn'),
+            classes='bottom_line'
+        )
+
+class BingoBoard(Static):
+
     fieldstate = [False for _ in range(25)]
 
     fields = [
@@ -93,13 +122,9 @@ class BingoApp(App):
 
     def compose(self) -> ComposeResult:
         """Create child widgets for the app."""
-        yield Header()
-
         for _ in range(25):
             yield BingoField(_, self.fields[_])
 
-        yield Footer()
-
     async def on_bingo_field_selected(self, message: BingoField.Selected) -> None:
         self.fieldstate[message.num] = message.selected
         if self.is_bingo():
@@ -143,10 +168,6 @@ class BingoApp(App):
         ])
         return bingo
 
-    def action_toggle_dark(self) -> None:
-        """An action to toggle dark mode."""
-        self.dark = not self.dark
-
 if __name__ == "__main__":
     app = BingoApp()
     app.run()
diff --git a/bingo.tcss b/bingo.tcss
index 1f8dd44..43a57f2 100644
--- a/bingo.tcss
+++ b/bingo.tcss
@@ -1,6 +1,25 @@
-Screen {
+BingoBoard {
     layout: grid;
     grid-size: 5 5;
+    height: 100%;
+}
+
+BingoDisplay {
+    layout: vertical;
+    height: 100%;
+}
+
+.bottom_line {
+    height: auto;
+    dock: bottom;
+}
+
+.seed_input {
+  width: 50%;
+  border-title-align: left;
+}
+.roll_btn {
+  width: 50%;
 }
 
 .box {