diff --git a/src/Core/Crawl/layout.cpp b/src/Core/Crawl/layout.cpp
index c224579..b53ee3c 100644
--- a/src/Core/Crawl/layout.cpp
+++ b/src/Core/Crawl/layout.cpp
@@ -29,7 +29,7 @@ void Layout::remove(ClasterItem *object) {
 
 }
 
-void Layout::changeLayout(const Refresh &fig) {
+void Layout::changeLayout(const LayoutType &fig) {
     _shape = fig;
     updatePosition();
 }
@@ -57,7 +57,7 @@ void Layout::updatePosition() {
         default:
             break;
      }
-     updatePosition();
+
 }
 
 void Layout::drawCircle() {
diff --git a/src/Core/Crawl/layout.h b/src/Core/Crawl/layout.h
index ba5828f..502bbfa 100644
--- a/src/Core/Crawl/layout.h
+++ b/src/Core/Crawl/layout.h
@@ -14,16 +14,65 @@
 namespace CRAWL {
 
 /**
- * @brief The Refresh enum Lists the shapes to convert the group object to.
+ * @brief The LayoutType enum Lists the shapes to convert the group object to.
  */
-enum Refresh {
+enum LayoutType {
+    /// The circle property calls the drawCircle method, which recalculates and updates
+    /// the coordinates of the passed object's positions.
     CIRCLE,
+
+    /// The square property calls the drawSquare method, which updates the coordinates of
+    /// the objects' positions, giving them the shape of a square.
     SQUARE,
+
+    /// The LINE property calls the drawLine method, which updates the coordinates of the
+    /// objects' positions, giving it a line shape.
     LINE
 };
 
 /**
- * @brief The ControlPos class The class that control position of group objects.
+ * @brief The Layout class The class that control position of group objects.
+ * ### Requried child classes: IWorldItem
+ *
+ * This class overloads the add() and remove() methods, which add objects to the cluster while updating positions according to the selected LayoutType.
+ * Has two public methods for setting the distance to the object and selecting the grouping of objects.
+ *
+ * ## Example of use
+ *
+ * ### For what this object uses
+ * This object is convenient to use if you want to create a cluster object directly, within which subobjects are grouped into a circle or square, depending on the selected property.
+ * For example : snake obstacle.
+ *
+ * ### Example of use
+ *
+ * 1. Create the GroupObjObstacle class.
+ *
+ * ```cpp
+ *
+ * class GroupObjObstacle: public CRAWL::Layout, public CRAWL::IWorldItem {
+ *
+ *      // sets the distance to the object from the center.
+ *      setDistance(20);
+ *
+ *      // Set the property of grouping objects
+ *      changeLayout(CRAWL::LayoutType::CIRCLE);
+ *
+ *      for(int i(0); i < 20; i++) {
+ *          add(new BoxItem);
+ *      }
+ *
+ * };
+ * ```
+ *
+ * @note The added object must inherit from ClasterItem and have a child class required for overloading software renderers.
+ *
+ * All done. Now the added objects will be grouped into a circle shape.
+ *
+ * You can change the center-to-object distance and the shape of a group of objects using the setDistance and changeLayout methods.
+ *
+ * @note This class requried the GuiObject functions as a parent class.
+ * @note This class requires an overload of the render method; The implementation must call the render methods of the parent classes.
+ *
  */
 class Layout: public GroupObject {
 public:
@@ -38,7 +87,7 @@ public:
      * @brief changeLayout This method defines the shape of the group object.
      * @param fig This is the name of the figure to change the group object.
      */
-    void changeLayout(const Refresh &fig);
+    void changeLayout(const LayoutType &fig);
 
     /**
      * @brief setDistance This method sets, depending on the shape selected, the radius for the circle or the indentation for the square.
@@ -70,7 +119,7 @@ private:
     void drawLine();
     
     int _distance;
-    Refresh _shape;
+    LayoutType _shape;
 
 };
 
diff --git a/src/CrawlTestLvl/private/groupobjbox.cpp b/src/CrawlTestLvl/private/groupobjbox.cpp
index 3b023c9..ac53b5e 100644
--- a/src/CrawlTestLvl/private/groupobjbox.cpp
+++ b/src/CrawlTestLvl/private/groupobjbox.cpp
@@ -13,28 +13,11 @@ namespace TestLvl {
 GroupObjBox::GroupObjBox(): CRAWL::IWorldItem("GroupObjBox") {
 
     setDistance(20);
-    changeLayout(CRAWL::Refresh::CIRCLE);
+    changeLayout(CRAWL::LayoutType::CIRCLE);
 
-    add(new BoxItem);
-    add(new BoxItem);
-    add(new BoxItem);
-    add(new BoxItem);
-    add(new BoxItem);
-    add(new BoxItem);
-    add(new BoxItem);
-    add(new BoxItem);
-    add(new BoxItem);
-    add(new BoxItem);
-    add(new BoxItem);
-    add(new BoxItem);
-    add(new BoxItem);
-    add(new BoxItem);
-    add(new BoxItem);
-    add(new BoxItem);
-    add(new BoxItem);
-    add(new BoxItem);
-    add(new BoxItem);
-    add(new BoxItem);
+    for(int i(0); i < 20; i++)   {
+        add(new BoxItem);
+    }
 
 }
 
diff --git a/src/CrawlTestLvl/private/world.cpp b/src/CrawlTestLvl/private/world.cpp
index 49dd068..f6e38f8 100644
--- a/src/CrawlTestLvl/private/world.cpp
+++ b/src/CrawlTestLvl/private/world.cpp
@@ -32,13 +32,13 @@ CRAWL::WorldRule *World::initWorldRules() {
     using Day = CRAWL::Day<CRAWL::Sun, CRAWL::Moon>;
 
     return new CRAWL::WorldRule {
-        {0, {{registerObject<Box>(), 1},
-//             {registerObject<CRAWL::Fire>(), 10},
-//             {registerObject<CRAWL::DynamicWint>(), 1},
+        {0, {{registerObject<Box>(), 100},
+             {registerObject<CRAWL::Fire>(), 10},
+             {registerObject<CRAWL::DynamicWint>(), 1},
 
              {registerObject<Background>(), 1},
              {registerObject<Day>(), 1}}},
-        {30,
+        {300,
             {
                 {registerObject<GroupObjBox>(),5}
             }