Thank you all,
It is with external power. The grey wire connecting to the "9V" pin
1.so for external power, is it gonna be ok to take this: http://www.dipmicro.com/img/1/DCA-FULLVIEW.jpg
cut his adapter-then i'll have two wires-so i'll connect one to "GND" pin and the other wire to "Vin" pin?
(im planing to do it with an old charger like nokia phone charger - but with the right properties)
-
The NPN, what do i need to know about it in the datasheet?
which one will fit the best:
http://www.taydaelectronics.com/2n3904-npn-general-propose-transistor.html
http://www.taydaelectronics.com/2sc945-c945-bipolar-transistors-npn-50v-0-15a.html
http://www.taydaelectronics.com/2n2222a-2n2222-npn-transistor-0-8a-40v-to-18.html
and whats are the purpose of each one, i mean whats the differences? -
just out of curiosity, insted of putting a resistor in every led, can't i put "high" resistor at the emmiter of each NPN? i mean between GND and Collector&Base "junction".
again thnak u all i apriciate your help 
CrossRoads special thank for the sketch pic