Using what you saw on the Studio Web videos, create a side menu on the right of the page that includes links you might add if you were creating a full website. For example your menu could include a "contact us" item etc. These links do not have to be active or go to a real page.
Using CSS layout techniques you have learned, create a responsive layout that changes the position of the menu, when the screen size changes. In other words, you are making a "reponsive" layout.
Now feel free to spice up your web page with anything you have learned so far (for example using an image bacground somewhere)
Congratulations! You have now completed your CSS project.