Readme updated

Author: EgorAlmikeev

README.md

@@ -1,2 +1,52 @@
 # ConsoleMenu
 A simple console menu for Python3.x scripts
+
+## How to
+All you need to do is to use dictionaries to define the structure of your menu.
+You're able to use functions and other menus as items, so you can build an infinitive nested menu.
+Then call **execute** method and that's it!
+
+```python
+import consolemenu
+
+def func1():
+    # Your code here
+
+def func2():
+    # Your code here
+
+def func3():
+    # Your code here
+
+nested_menu = ConsoleMenu(
+    "Sample nested menu",
+    {
+        "call func1": func1,
+        "call func2": func2,
+        "call func3": func3,
+    }
+)
+
+menu = ConsoleMenu(
+    "Sample menu",
+    {
+        "call func1": func1,
+        "call func2": func2,
+        "call func3": func3,
+        "goto nested menu": nested_menu,
+    }
+)
+
+menu.execute()
+```
+
+The output will be:
+```
+Sample menu
+1) call func1
+2) call func2
+3) call func3
+4) goto nested menu
+5) exit
+run:
+```