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 set the value of the flexGrow property to "5" for the blue div element
Note: Internet Explorer 10 and earlier versions earlier versions do not support the flexGrow property.
Note: Safari 6.1 (and newer) supports an alternative, the WebkitFlexGrow property.