can change the lockscreen.

Please push Startbutton of this app's menu.

can variously set.

Image→Three pieces. Random display..
Vib→0~9999ms.
Background→Black or Transparent.

If want to use Free App↓
Clock Lock Screen - Cheasy
https://play.google.com/store/apps/details?id=front.clockC

log
2017/11/11:packaged(Android 8.1)
2016/09/10:fix(icon)
2016/09/03:packaged(Android 7.0)
2016/01/31:fix(bug)
2016/01/30:fix(bug)
2016/01/28:add(android.permission.READ_EXTERNAL_STORAGE)
2016/01/27:add(count(days))
2015/09/20:fix(bug)
2015/09/12:release