aplicacion terminada, clase widget creada y separacion bloc

lib/widgets/background_widget.dart

@@ -0,0 +1,22 @@
+import 'package:flutter/material.dart';
+
+class BackgroundWidget extends StatelessWidget {
+  final Widget child;
+
+  const BackgroundWidget({required this.child, Key? key}) : super(key: key);
+
+  @override
+  Widget build(BuildContext context) {
+    return Stack(
+      children: [
+        Positioned.fill(
+          child: Image.asset(
+            'assets/logo-fondo-verde.png',
+            fit: BoxFit.cover,
+          ),
+        ),
+        child,
+      ],
+    );
+  }
+}