self sustaining (DC) RC circuit

[ahmed34234]

hi

i want to drive led's through a RC series (time constant) circuit, which is powered by a DC source and when the capacitor is fully charged,, the switches should be such that the capacitor will discharge automatically glowing the led's from opposite direction,

So the led's will give one colour when the capacitor is charging and will glow to another colour when it is discharging,,
The problem is ,, i m not able to find appropiate switches for my project :(

PLease HelP me out ,,
Thanks

[Bob S]

Some LEDs are bipolar (e.g., red/green), and will glow one color when the voltage/current is in one direction, and another color when the voltage/current is reversed.
Bob S