LM317T Voltage Regulator with Pass Transistor

Police Siren Emulation. 12vdc input from battery, that's fed into a 555 timer which makes the BLUE LED Blink, I then have a 1k resistor from the output into the transistor which inverts the signal to switch the RED led on. I have a 2nd feed into an lm317t which knocks the voltage down to 2volts which gets fed into a CMOS Oscillator which is then boosted by a transistor which gets fed to the speaker to ground. End result is this...



http://www.youtube.com/watch?v=U08WilAcxGQ&hl=en