Rail Road crossing Flashing LED using 555 IC

This circuit flashes two red LEDs for a model railway crossing.The circuit uses a 555 IC to flash the LED's alternatively to give effect of a rail-roard crossing lights.

COMPONENTS USED :

1.555 IC
2.two LED's (any color but recommended Red)
3.Two 470 ohm/ 220 ohm resistances
4.one 47K resistance
5.one 10uF Electrolytic Capacitance
6.one 6-12V supply

STEPS :

1.Place 555 IC on BreadBoard.
2.connect pin 2 to pin 6.
3.connect pin 4 to pin 8.
4.connect a 47K resistance between pin 2 and pin 3.
5.connect a 10uF cap between pin 2 and ground.
6.connect pin 1 to ground.
7.connect pin 8 to VCC.
8.connect a 470/220 ohm resistance between pin 3 and shorter leg of a LED,connect the longer led of that LED to VCC.
9.connect another 470/220 ohm resistance between pin 3 and longer led of 2nd LED , connect the shorter leg of that LED to ground.
10.Switch on Power supply and Enjoy.!

(NOTE : In pics below i have placed a series of resistances to make up 47K resistance,also instead of only 2 LED's  i used 4 . Just place  LED in parallel with LED's in your circuit and you are done.You can also place them in series but it will dim their intensity)