loading

Multi Flash Flasher circuit?

I am trying to make my own flasher controller for a pair of LED light modules.  The 12 volt, low amp draw lights are to be used on a golf cart that we use when the patrol cars are not needed on campus. Traffic control is the main use due to being able to put it anywhere the patrol cars will not go. The flash patterns can be any type as long as it is automatic, and keep changing, like the strobe lights on police, fire, and EMS units. Some have 4 patterns, some have up to 18 patterns. Any one have a diagram or circuit design that may work? Thanks for any help.