Created a basic 5x5 Grid in the UI that randomly changes Color on click

lib/main.dart

@@ -1,3 +1,4 @@
+import 'dart:math';
 import 'package:flutter/material.dart';
 
 void main() {
@@ -11,7 +12,7 @@ class MyApp extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     return MaterialApp(
-      title: 'Flutter Demo',
+      title: 'Bubble-Twist',
       theme: ThemeData(
         // This is the theme of your application.
         //
@@ -55,71 +56,60 @@ class MyHomePage extends StatefulWidget {
 }
 
 class _MyHomePageState extends State<MyHomePage> {
-  int _counter = 0;
-
-  void _incrementCounter() {
-    setState(() {
-      // This call to setState tells the Flutter framework that something has
-      // changed in this State, which causes it to rerun the build method below
-      // so that the display can reflect the updated values. If we changed
-      // _counter without calling setState(), then the build method would not be
-      // called again, and so nothing would appear to happen.
-      _counter++;
-    });
-  }
+  List<List<int>> _grid = List.generate(5, (_) => List.generate(5, (_) => Random().nextInt(5)));
 
   @override
   Widget build(BuildContext context) {
-    // This method is rerun every time setState is called, for instance as done
-    // by the _incrementCounter method above.
-    //
-    // The Flutter framework has been optimized to make rerunning build methods
-    // fast, so that you can just rebuild anything that needs updating rather
-    // than having to individually change instances of widgets.
     return Scaffold(
       appBar: AppBar(
-        // TRY THIS: Try changing the color here to a specific color (to
-        // Colors.amber, perhaps?) and trigger a hot reload to see the AppBar
-        // change color while the other colors stay the same.
-        backgroundColor: Theme.of(context).colorScheme.inversePrimary,
-        // Here we take the value from the MyHomePage object that was created by
-        // the App.build method, and use it to set our appbar title.
-        title: Text(widget.title),
+        title: Text('Candy Crush'),
       ),
       body: Center(
-        // Center is a layout widget. It takes a single child and positions it
-        // in the middle of the parent.
-        child: Column(
-          // Column is also a layout widget. It takes a list of children and
-          // arranges them vertically. By default, it sizes itself to fit its
-          // children horizontally, and tries to be as tall as its parent.
-          //
-          // Column has various properties to control how it sizes itself and
-          // how it positions its children. Here we use mainAxisAlignment to
-          // center the children vertically; the main axis here is the vertical
-          // axis because Columns are vertical (the cross axis would be
-          // horizontal).
-          //
-          // TRY THIS: Invoke "debug painting" (choose the "Toggle Debug Paint"
-          // action in the IDE, or press "p" in the console), to see the
-          // wireframe for each widget.
-          mainAxisAlignment: MainAxisAlignment.center,
-          children: <Widget>[
-            const Text(
-              'You have pushed the button this many times:',
-            ),
-            Text(
-              '$_counter',
-              style: Theme.of(context).textTheme.headlineMedium,
-            ),
-          ],
+        child: GridView.builder(
+          shrinkWrap: true,
+          gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(
+            crossAxisCount: 5,
+          ),
+          itemCount: _grid.length * _grid.length,
+          itemBuilder: (BuildContext context, int index) {
+            int row = index ~/ _grid.length;
+            int col = index % _grid.length;
+            return GestureDetector(
+              onTap: () => _onTileTap(row, col),
+              child: Container(
+                margin: EdgeInsets.all(4),
+                decoration: BoxDecoration(
+                  color: _getColor(_grid[row][col]),
+                  borderRadius: BorderRadius.circular(8),
+                ),
+              ),
+            );
+          },
         ),
       ),
-      floatingActionButton: FloatingActionButton(
-        onPressed: _incrementCounter,
-        tooltip: 'Increment',
-        child: const Icon(Icons.add),
-      ), // This trailing comma makes auto-formatting nicer for build methods.
     );
   }
+
+  Color _getColor(int value) {
+    switch (value) {
+      case 0:
+        return Colors.red;
+      case 1:
+        return Colors.blue;
+      case 2:
+        return Colors.green;
+      case 3:
+        return Colors.yellow;
+      case 4:
+        return Colors.orange;
+      default:
+        return Colors.white;
+    }
+  }
+
+  void _onTileTap(int row, int col) {
+    setState(() {
+      _grid[row][col] = Random().nextInt(5);
+    });
+  }
 }