C# Application to Interact with Webpage in Realtime

Looking for a C# Application that can talk to a webpage in realtime to display an image for 15 seconds and have it slide out of view. -The purpose of this project is to replicate a feature in an existing Application to use in my own Application. Video Example of Task: [login to view URL] Webpage Used in Example: [login to view URL] Requirements: -Small C# Application with source code that accomplishes task. -Webpage with code for me to upload to my server that accomplishes task.