Here is an app to customize your Dot Lock screen if you are bored with the stock android dot / pattern lock styles.
https://play.google.com/store/apps/details?id=com.SolarSpark.DotLocker
Free version https://play.google.com/store/apps/details?id=com.SolarSpark.DotLockerLite
https://play.google.com/store/apps/details?id=com.SolarSpark.DotLocker
Free version https://play.google.com/store/apps/details?id=com.SolarSpark.DotLockerLite