12.6v DC LED Flashers??? Need wiring help!

[espinobj]

Im working on a circuit to work off of a car batt, and well to be honest I dont know where to go. Would you be willing to give me some help maybe if you have it some where a diagram?
I have 10 LED's and I want 2 sets of five to flash more like strobe to be honest.
This is the info on the LED's
Luminous Intensity: 27000mcd typ. @ 20mA Max
Forward Current: 30mA
Pulse Current: 100mA for <= 10ms, duty <= 1/10
Forward Voltage: 3.2V typ. 3.5V max @ 20mA
Max Reverse Voltage: 5V
Power Dissipation: 105mW
Operating Temp: -30 to +85 C
Soldering Temp: 265 C for 10 secs
Max Reverse Current: 50uA @ 5V

I would like it to flash very quickly 3 times then switch to the other side.
Is there a way to control the speed and number of flashes?
And how does it work being only 12v in but the lights are going to drain 32v?

And a second question I would like a megaphone was well.
Something that has like a siren, some other sounds, that old chitty chitty bang bang car horn would fricken awesome, and a microphone input would be cool. But this is secondary to the flashing lights.

Is any of the possible? Thank you!

[Hero999]

There are all sorts of ways of making the patten generator, here's one idea.

The LEDs will need to be driven using transistors and you'll need an LM7805 for the 74HC132.

Where did you get 32V from? The highest voltage in the circuit is 12V.

You can buy sirens from various suppliers.