When you see a web page with something you like on it, but you don't know how to design it yourself, or don't have the time to reinvent what already exists, you can see the HTML used on the page you are viewing and modify it for your own needs.
If you are using an older version of Internet Explorer, click on the menu tab "View" then select "Source". Try it on this page.
If you are using a newer version of Internet Explorer, press the F12 button to open "Developer Tools", then click on the "Script" tab. Try it on this page.
If you are using any other browser, see if you can find the equivalent of "View Source". Try it on this page.
Chances are you could be overwhelmed with all the code you see. Rest assured, by the time you finish this course, you will understand all of it.
If you see something you don't understand, leave it alone. Try to copy what interests you then paste it in your file.
You do not have a license to steal whatever you want from the internet, but most web page authors won't mind copying bits and pieces here and there. If you copy a major work, be sure to give credit to the author. If you copy something really major, get permission from the author first.
Go ahead and close the View Source window or Developer Tools as the case may be.