A lock screen app has lens flare effect, exactly the same as S4.
Also you can set camera shortcut to access camera easily, setup your personal text, add application shortcuts.


PS:
1. Click settings icon on right of tool bar to enter theme settings.
2. Launch X Locker, you can change wallpaper, setup security lock, and more.

This is a theme of X Locker, need install X Locker to run this theme.