If you want to have unique theme on the lock screen of the device, that you can do with Lollipop Lockscreen with multiple functions.

• highly customizable toolbar
• Style Android 5 Lollipop
• Change, add or remove Wallpaper from Gallery
• Live Wallpaper with animated effects
• PIN code or unlock pattern
• Invisible mode and smart lock
• weather Display on the lock mode
• Convenient setting of date and time
• Edit font style, themes, positions of time and date
• Sound notifications, adding unnecessary in the "black list"
• Ability to access apps directly from lock screen
• Controller music