ICM: Example png added.

Author: dmitry-ivanov

README.md

@@ -41,10 +41,8 @@ Prevents overlapping for Laravel console commands.
     ```
 
 3. Now your command is protected against overlapping:
-    ```shell
-    ➜ php artisan foo:bar baz
-    Command is running now!
-    ```
+
+![Example](doc/img/example.png)
 
 ## Strategies