refactoring and added comments

using_gradient/lib/utils.dart

@@ -0,0 +1,11 @@
+import 'package:flutter/material.dart';
+
+LinearGradient getCustomGradient() {
+  // Define a Linear Gradient
+  return new LinearGradient(
+      colors: [Colors.lightBlueAccent, Colors.blueAccent],
+      begin: const FractionalOffset(0.0, 0.0),
+      end: const FractionalOffset(0.6, 0.0),
+      stops: [0.0, 0.6],
+      tileMode: TileMode.clamp);
+}