This example is for Wiring version 1.0 build 0100+. If you have a previous version, use the examples included with your software. If you see any errors or have comments, please let us know.
The trafficLight() turns ON the specified light and waits 2 seconds. Each call to trafficLight() specifies the pin in which a color LED is connected, turns OFF all colors and then turn ON the one specified
int RED = 8;
int YELLOW = 9;
int GREEN = 10;
void trafficLight(int color)
// turn OFF all lightsdigitalWrite(RED, LOW);
// turn ON the one receiveddigitalWrite(color, HIGH);