Colorful-IDE is an extension made to beautify Visual Studio. You can not only set a background image , but you can also set how long the image will change, even how the image changes. The extension is listed here.
You can also download the latest version via this link.
To build this project, you must have the Visual Studio 2013 or up to be installed and the extension sdk must also be setup.
This is a open-sourced project based on ClaudiaIDE. So without their work, our extension could not be made so easily. Thanks for the work done by the ClaudiaIDE.