Update example in README

README.md

@@ -48,8 +48,16 @@ var position = world
 	// The "Position" struct is defined at the bottom of this example.
 	.InitComponent<Position>();
 
-world.New("One").Set(new Position( 0,  0)).Build();
+// Create an "Entities" parent with two positioned entities inside.
-world.New("Two").Set(new Position(10, 20)).Build();
+var entities = world.New("Entities").Build();
+entities.NewChild("One").Set(new Position(-5,  0)).Build();
+entities.NewChild("Two").Set(new Position(10, 20)).Build();
+
+// Changed my mind: Let's multiply each entity's position by 10.
+foreach (var child in entities.GetChildren()) {
+  ref var pos = ref child.GetRefOrThrow<Position>();
+  pos = new(pos.X * 10, pos.Y * 10);
+}
 
 var onUpdate = world.LookupOrThrow("/flecs/pipeline/OnUpdate");
 
@@ -57,21 +65,21 @@ var onUpdate = world.LookupOrThrow("/flecs/pipeline/OnUpdate");
 // the "Position" component downwards by 2 every frame.
 world.New("FallSystem").Build()
 	.InitSystem(onUpdate, new("Position"), iter => {
-		var positionSpan = iter.Field<Position>(1);
+		var posColumn = iter.Field<Position>(1);
 		for (var i = 0; i < iter.Count; i++) {
-			ref var position = ref positionSpan[i];
+			ref var pos = ref posColumn[i];
-			position = new(position.X, position.Y + 2);
+			pos = new(pos.X, pos.Y + 2);
 		}
 	});
 
 // Create a system that will print out entities' positions.
 world.New("PrintPositionSystem").Build()
 	.InitSystem(onUpdate, new("[in] Position"), iter => {
-		var positionSpan = iter.Field<Position>(1);
+		var posColumn = iter.Field<Position>(1);
 		for (var i = 0; i < iter.Count; i++) {
-			var entity   = iter.Entity(i);
+			var entity = iter.Entity(i);
-			var position = positionSpan[i];
+			var pos    = posColumn[i];
-			Console.WriteLine($"{entity.Name} is at {position}");
+			Console.WriteLine($"{entity.Name} is at {pos}");
 		}
 	});