diff --git a/README.md b/README.md
index 4c42065..9028207 100644
--- a/README.md
+++ b/README.md
@@ -12,8 +12,50 @@ This library consists of two levels (AbstractNode level and DataBaseNode level).
 ### AbstractNode level (1)
 #### Description
 The AbstractNode level implement only base functons of create new work threads and parsing packages.
-Example of use AbstractNode level
 
+For more information see QuasarApp Heart documentation.
+
+### DataBaseNode level (2)
+#### Description
+The DataBaseNode level implement methods and packages for work with databases. This level using Qt classes for wrking with database, so for more information about suport databases see [Qt Documentation](https://doc.qt.io/qt-5/sql-driver.html).
+
+### NetworkNode level (3)
+#### Description
+This level is still in develop. 
+
+## Build and Include
+
+### For cmake projects
+ 
+ * cd yourRepo
+ * git submodule add https://github.com/QuasarApp/Heart.git # add the repository of Heart into your repo like submodule
+ * git submodule update --init --recursive
+ * Include in your CMakeLists.txt file the main CMakeLists.txt file of Heart library
+     ``` cmake
+     add_subdirectory(Heart)
+     ```
+ * select requiriment build level for you project
+     ```
+     set(HEART_BUILD_LVL 2)
+     ```
+     where 1 - is code of build level 
+   
+     1 - AbstractNode
+   
+     2 - DataBaseNode
+   
+     3 - NetworkNode
+ * link the Heart library to your target
+     ```cmake
+     target_link_libraries(yourLib PUBLIC Heart)
+     ```
+ * rebuild yuor project
+
+
+
+## Usage
+
+Create a own package class and override some basic methods.
 ```cpp
 
 class MyPackage: public QH::AbstractData
@@ -60,7 +102,10 @@ protected:
     }
 
 };
+```
 
+Create a server class and override parsePackage method for work with packages.
+```cpp
 class TestingServer: public QH::AbstractNode {
 
 
@@ -93,12 +138,17 @@ protected:
     
     }
 };
+```
 
+Create a client class and override parsePackage method for work with packages.
+
+```cpp
 
 class TestingClient: public QH::AbstractNode {
 
 
 protected:
+    // parsing incoming packages
     ParserResult DataBaseNode::parsePackage(const Package &pkg,
                                             const AbstractNodeInfo *sender) {
                                             
@@ -110,14 +160,16 @@ protected:
         if (H_16<MyPackage>() == pkg.hdr.command) {
             MyPackage obj(pkg);
    
+            // print responce of server
             std::cout << obj._data;
             ...
             return ParserResult::Processed;            
         }
+        // Do not forget return status of parsing packages
         return ParserResult::NotProcessed;
     
     }
-    
+    // sending request to server
     bool sendMyPackage() {
         Ping cmd;
         return sendData(&cmd, address);
@@ -125,54 +177,5 @@ protected:
 };
 ```
 
-For more information see QuasarApp Heart documentation.
-
-### DataBaseNode level (2)
-#### Description
-The DataBaseNode level implement methods and packages for work with databases. This level using Qt classes for wrking with database, so for more information about suport databases see [Qt Documentation](https://doc.qt.io/qt-5/sql-driver.html).
-
-Example of use DataBaseNode level
-
-```cpp
-EXAMPLE
-```
-### NetworkNode level (3)
-#### Description
-This level is still in develop. 
-
-## Build and Include
-
-### For cmake projects
- 
- * cd yourRepo
- * git submodule add https://github.com/QuasarApp/Heart.git # add the repository of Heart into your repo like submodule
- * git submodule update --init --recursive
- * Include in your CMakeLists.txt file the main CMakeLists.txt file of Heart library
-     ``` cmake
-     add_subdirectory(Heart)
-     ```
- * select requiriment build level for you project
-     ```
-     set(HEART_BUILD_LVL 2)
-     ```
-     where 1 - is code of build level 
-   
-     1 - AbstractNode
-   
-     2 - DataBaseNode
-   
-     3 - NetworkNode
- * link the Heart library to your target
-     ```cmake
-     target_link_libraries(yourLib PUBLIC Heart)
-     ```
- * rebuild yuor project
-
-
-
-## Usage
-
-To-do
-