If you have a Google account, you can save this code to your Google Drive.
Google will ask you to confirm Google Drive access.
Save file as:
If you have saved a file to Google Drive, you can open it here:
Click the "Try it" button to change the position property of the DIV element:
This DIV element is placed 20 pixels from the top of its original position.
Click the button to set the position property to "absolute" and see what happens.
It will then be placed 20 pixels from the top the page.