Parkour (abbreviated PK) is a training method which focuses on rational movement in both the natural and urban environments. The focus is to move around obstacles with speed and efficiency. The main purpose of the discipline is to teach participants how to move through their environment by vaulting, rolling, running, climbing and jumping. Parkour practitioners are known as traceurs. They train to be able to identify and utilize alternate, more efficient paths. Parkour can be practiced anywhere, but areas dense with obstacles offer many training opportunities. SDCard installation available. This is a Live Wallpaper, so, here's what you have to do to install it: STEP 1. Tap and hold Press the home button to first go to the homescreen. On the homescreen, just tap and hold on any blank spot until a context menu appears. STEP 2. Tap on “Wallpaper” and then “Live Wallpaper” In the menu or dialog box that showed up in STEP 1, just tap on the “Wallpaper” option, and then the “Live Wallpaper” menu item. STEP 3. Select Bloody Birds Live Wallpaper STEP 4. Tap "Set Wallpaper" to set it or "Settings" to configure it This free app is ad supported and may contain ads in the notification tray and/or home screen.