Seeking Developer for iPhone Wallpaper Switcher

I am seeking a software developer to create a wallpaper switcher application for the iPhone. Right now, users can choose one wallpaper to display on their iPhone. If they want to change the wallpaper, they must go to Settings and manually change it there. I would like to create an application for the iPhone that allows users to specify multiple wallpapers and the time each wallpaper stays "active" before it gets switched out with a new one. For example, the user picks 10 wallpapers and tells the app they want to have a new wallpaper be set once every 5 minutes (or once an hour, etc.). Thank you.