You can do much more than just writing in Notepad. You can select its menu items, using keyboard shortcuts.
When you press left Alt key, you will see underlined letters in menu items names. These letters make keyboard shortcuts to their respective items. For example, if you want to change text font, you should press Alt+O to enter the Format menu,
then F key to select Font item and open its dialog box.
Your robot script can do exactly the same:
program notepad
keyboard Hello⋘enter⋙world!
keyboard ⋘alt+o⋙f
In the next lesson you will learn how to make sure your robot stays focused on the right application window.