Okay, so this seems like a silly thing to ask, but in the past couple days when I start up my ipad there is an icon or a button on the left hand side of the screen which is about the size of a regular icon. It only appears before pulling up the passcode screen for the first time and subsequently disappears. It seems to only appear when using one of the default solar system wallpapers. It is always mostly transparent but it changes color depending on which planet is being used eg reddish brown for Mars or yellowish brown for Saturn etc. it also moves position based on which wallpaper is being used. The button has no icon or any other features. Tapping on the button causes it to blink as if it was pressed, but nothing else happens. Just curious what this button or icon is.