diff --git a/Dockerfile b/Dockerfile
new file mode 100644
index 0000000..874d226
--- /dev/null
+++ b/Dockerfile
@@ -0,0 +1,3 @@
+FROM php:8.3-cli-alpine3.22
+
+ENTRYPOINT ["php", "-S", "localhost:8008", "-t", "public/"]
\ No newline at end of file
diff --git a/code/decorator.php b/code/decorator.php
new file mode 100644
index 0000000..ae4e1ec
--- /dev/null
+++ b/code/decorator.php
@@ -0,0 +1,12 @@
+<?php
+
+/**
+ * @package: patterns
+ * @author: Yevhen Odynets
+ * @date: 2025-07-04
+ * @time: 10:39
+ */
+
+declare(strict_types = 1);
+
+dump('Decorator');
\ No newline at end of file
diff --git a/code/prototype.php b/code/prototype.php
index f80082f..7e477dc 100644
--- a/code/prototype.php
+++ b/code/prototype.php
@@ -36,5 +36,5 @@ function client(): void
     /** @noinspection ForgottenDebugOutputInspection */
     dump($draft);
 }
-
+?><img class="diagram" src="/assets/img/diagrams/prototype.png" alt="Adapter DEsign Pattern Diagram"><?php
 client();
diff --git a/code/singleton.php b/code/singleton.php
index 8d3b4ac..9a25ed8 100644
--- a/code/singleton.php
+++ b/code/singleton.php
@@ -16,7 +16,7 @@ use Pattern\Creational\{Singleton\Single, Singleton\Singleton};
  *
  * @noinspection ForgottenDebugOutputInspection
  */
-function clientCode(): void
+function client(): void
 {
     $output = [
         'where' => trace(),
@@ -36,7 +36,8 @@ function clientCode(): void
     dump($output, $output['s1']->getValue(), $output['s2']->getValue());
 }
 
-clientCode();
+?><img class="diagram" src="/assets/img/diagrams/singleton.png" alt="Adapter DEsign Pattern Diagram"><?php
+client();
 
 $single = Single::getInstance('from subclass');
 $single->setValue('value set from Single::class')->childish();
diff --git a/composer.json b/composer.json
index d2c834f..f3b6eaa 100644
--- a/composer.json
+++ b/composer.json
@@ -13,8 +13,7 @@
   ],
   "require": {
     "php": "8.3.*",
-    "ext-simplexml": "*",
-    "ext-yaml": "*"
+    "ext-simplexml": "*"
   },
   "require-dev": {
     "friendsofphp/php-cs-fixer": "^3.76"
diff --git a/composer.lock b/composer.lock
index f80d22f..33e17b1 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "8d4ed5a63e8da7821980256ec54097f7",
+    "content-hash": "15fcc4c375fa23daddd63652d90fdeab",
     "packages": [],
     "packages-dev": [
         {
@@ -2544,7 +2544,10 @@
     "stability-flags": {},
     "prefer-stable": false,
     "prefer-lowest": false,
-    "platform": {},
+    "platform": {
+        "php": "8.3.*",
+        "ext-simplexml": "*"
+    },
     "platform-dev": {},
     "plugin-api-version": "2.6.0"
 }
diff --git a/public/assets/img/diagrams/prototype.png b/public/assets/img/diagrams/prototype.png
new file mode 100644
index 0000000..dead9b3
Binary files /dev/null and b/public/assets/img/diagrams/prototype.png differ
diff --git a/public/assets/img/diagrams/singleton.png b/public/assets/img/diagrams/singleton.png
new file mode 100644
index 0000000..f353122
Binary files /dev/null and b/public/assets/img/diagrams/singleton.png differ
diff --git a/public/index.php b/public/index.php
index 028f73b..a8659ac 100644
--- a/public/index.php
+++ b/public/index.php
@@ -41,25 +41,28 @@ require '../src/helpers.php';
             transform: translate(-50%, -50%);
             max-height: 92dvh;
             overflow-y: auto;
-            background-color: attr(data-color type(<color>), #eef0f0);
+            background-color: attr(data-color type(< color >), #eef0f0);
         }
 
         pre, code {
             font-family: Consolas, monospace;
             font-size: 1.125rem;
         }
+
         pre {
             align-self: center;
         }
 
         img.diagram {
+            display: block;
             max-width: 100%;
+            margin: 0 auto 1rem;
         }
 
         .et {
             position: absolute;
-            top: .5rem;
-            left: .5rem;
+            bottom: .5rem;
+            right: .5rem;
             font-size: small;
             font-weight: 500;
             color: #333;
@@ -68,12 +71,10 @@ require '../src/helpers.php';
 </head>
 <body>
 <main data-color="#eef0f0">
-    <?php require '../src/router.php' ?>
+    <?php
+    require '../src/router.php' ?>
 </main>
 <div class="et">ET: <?= (microtime(true) - $time_start) ?> secs</div>
 <script>hljs.highlightAll()</script>
 </body>
-</html>
-
-
-
+</html>
\ No newline at end of file
diff --git a/src/Pattern/Structural/Decorator/BorderDecorator.php b/src/Pattern/Structural/Decorator/BorderDecorator.php
new file mode 100644
index 0000000..b679bf9
--- /dev/null
+++ b/src/Pattern/Structural/Decorator/BorderDecorator.php
@@ -0,0 +1,22 @@
+<?php
+
+/**
+ * @package: patterns
+ * @author: Yevhen Odynets
+ * @date: 2025-07-04
+ * @time: 10:42
+ */
+
+declare(strict_types = 1);
+
+namespace Pattern\Structural\Decorator;
+
+class BorderDecorator implements ShapeInterface
+{
+    public function __construct(private ShapeInterface $shape) {}
+
+    public function draw(): void
+    {
+        echo '<div style="width: 8rem; height: 8rem; border: .5rem solid orange"></div>';
+    }
+}
\ No newline at end of file
diff --git a/src/Pattern/Structural/Decorator/Circle.php b/src/Pattern/Structural/Decorator/Circle.php
new file mode 100644
index 0000000..6bb7562
--- /dev/null
+++ b/src/Pattern/Structural/Decorator/Circle.php
@@ -0,0 +1,20 @@
+<?php
+
+/**
+ * @package: patterns
+ * @author: Yevhen Odynets
+ * @date: 2025-07-04
+ * @time: 10:41
+ */
+
+declare(strict_types = 1);
+
+namespace Pattern\Structural\Decorator;
+
+class Circle implements ShapeInterface
+{
+    public function draw(): void
+    {
+        // TODO: Implement draw() method.
+    }
+}
\ No newline at end of file
diff --git a/src/Pattern/Structural/Decorator/EmailDecorator.php b/src/Pattern/Structural/Decorator/EmailDecorator.php
new file mode 100644
index 0000000..99b2ec3
--- /dev/null
+++ b/src/Pattern/Structural/Decorator/EmailDecorator.php
@@ -0,0 +1,22 @@
+<?php
+
+/**
+ * @package: patterns
+ * @author: Yevhen Odynets
+ * @date: 2025-07-04
+ * @time: 10:43
+ */
+
+declare(strict_types = 1);
+
+namespace Pattern\Structural\Decorator;
+
+class EmailDecorator implements ShapeInterface
+{
+    public function __construct(private ShapeInterface $shape) {}
+
+    public function draw(): void
+    {
+        // TODO: Implement draw() method.
+    }
+}
\ No newline at end of file
diff --git a/src/Pattern/Structural/Decorator/ShapeInterface.php b/src/Pattern/Structural/Decorator/ShapeInterface.php
new file mode 100644
index 0000000..66cfb98
--- /dev/null
+++ b/src/Pattern/Structural/Decorator/ShapeInterface.php
@@ -0,0 +1,17 @@
+<?php
+
+/**
+ * @package: patterns
+ * @author: Yevhen Odynets
+ * @date: 2025-07-04
+ * @time: 10:38
+ */
+
+declare(strict_types = 1);
+
+namespace Pattern\Structural\Decorator;
+
+interface ShapeInterface
+{
+    public function draw(): void;
+}
\ No newline at end of file
diff --git a/src/Pattern/Structural/Decorator/SmileDecorator.php b/src/Pattern/Structural/Decorator/SmileDecorator.php
new file mode 100644
index 0000000..2e57530
--- /dev/null
+++ b/src/Pattern/Structural/Decorator/SmileDecorator.php
@@ -0,0 +1,22 @@
+<?php
+
+/**
+ * @package: patterns
+ * @author: Yevhen Odynets
+ * @date: 2025-07-04
+ * @time: 10:47
+ */
+
+declare(strict_types = 1);
+
+namespace Pattern\Structural\Decorator;
+
+class SmileDecorator implements ShapeInterface
+{
+    public function __construct(private ShapeInterface $shape) {}
+
+    public function draw(): void
+    {
+        // TODO: Implement draw() method.
+    }
+}
\ No newline at end of file
diff --git a/src/Pattern/Structural/Decorator/Square.php b/src/Pattern/Structural/Decorator/Square.php
new file mode 100644
index 0000000..6363022
--- /dev/null
+++ b/src/Pattern/Structural/Decorator/Square.php
@@ -0,0 +1,20 @@
+<?php
+
+/**
+ * @package: patterns
+ * @author: Yevhen Odynets
+ * @date: 2025-07-04
+ * @time: 10:41
+ */
+
+declare(strict_types = 1);
+
+namespace Pattern\Structural\Decorator;
+
+class Square implements ShapeInterface
+{
+    public function draw(): void
+    {
+        // TODO: Implement draw() method.
+    }
+}
\ No newline at end of file
diff --git a/src/Pattern/Creational/Singleton/Loggable.php b/storage/patterns_examples/singleton/Loggable.php
similarity index 78%
rename from src/Pattern/Creational/Singleton/Loggable.php
rename to storage/patterns_examples/singleton/Loggable.php
index cb713ce..c1f4f29 100644
--- a/src/Pattern/Creational/Singleton/Loggable.php
+++ b/storage/patterns_examples/singleton/Loggable.php
@@ -9,7 +9,7 @@
 
 declare(strict_types = 1);
 
-namespace Pattern\Creational\Singleton;
+namespace RefactoringGuru\Builder\RealWorld\singleton;
 
 interface Loggable
 {
diff --git a/src/Pattern/Creational/Singleton/Logger.php b/storage/patterns_examples/singleton/Logger.php
similarity index 98%
rename from src/Pattern/Creational/Singleton/Logger.php
rename to storage/patterns_examples/singleton/Logger.php
index edc2502..1049600 100644
--- a/src/Pattern/Creational/Singleton/Logger.php
+++ b/storage/patterns_examples/singleton/Logger.php
@@ -12,7 +12,7 @@
 
 declare(strict_types = 1);
 
-namespace Pattern\Creational\Singleton;
+namespace RefactoringGuru\Builder\RealWorld\singleton;
 
 use RuntimeException;