does anyone have any idea, help to offer me about making a led candle which will hopefully be controlled by pd and an aurdnio board.

Thanks in advance.

Huh? You want to know how to emulate a candle? Flicker? Of just hook a led to an Arduino and control with pd?

both actually, so any help would be greatly appreciated.

Well, there's tons of info on the arduino playground site. The blinking led example comes with the Arduino environment. IF you want connectivity with Pd, Hans' Firmata and Pduino should help. Without using the Firmata it is also possible to just talk to arduino via the serial port. Flickering could be accomplished easily by analogWrite-ing values based on a perlin noise function. Flickering led's are often found in those plastic 'votive candles' that are so prevalent now. This is accomplished with an analog noise circuit.