Just so you know the video makes the lights look inconsistent, in game all the strobes take the same amount of time and every step is set to a length of 1.
This is a pack that was inspired by the DOJ GTA5RP server. This pattern was used in late 2017 and throughout most of 2018 by the sheriffs office. I tried to replicate it as accurately as possible however the maximum step limit combined with some of the missing light options lead to a slightly modified version. This pack includes:
There may be more customization added like front and back visor lights, LED flashers for side windows, bumpers etc.