led_array.pde

int pins[] = {11, 10, 9};  // R, G, B
int pinCnt = sizeof(pins) / sizeof(pins[0]); 
String mode = "not test"; //set to test to debug
String mesg = "Pin ";
void setup()
{
  Serial.begin(9600); 
  if (mode == "test") {
    for (int i=0; i < pinCnt; i++){
      pinMode(pins[i], OUTPUT); // set pin modes
    }
  }
}

void loop()
{
  if (mode == "test") {
    for (int i=0; i < pinCnt; i++){
      for (int j=0; j < pinCnt; j++){
        if (i==j){
          digitalWrite(pins[j], HIGH);
          Serial.println(mesg + pins[j] + " is on"); 
        } else {
          digitalWrite(pins[j], LOW);
        }
      }
      delay(500);
    }
  } else {  // MAIN FUNCTION
    for (int i=0; i < pinCnt; i++){
      ledUp(pins[i],30);                        
      for (int j=0; j < pinCnt; j++){
        if (j!=i){
          ledUp(pins[j],30);
          for (int k=0; k < pinCnt; k++){
            if (k!=j && k!=i){ 
              ledUp(pins[k],30);
              ledDown(pins[k],30);
            }
          }
          ledDown(pins[j],30);
        }
      }
      ledDown(pins[i],30);
    }
  }
}
void ledDown(int pin, int lag){
  Serial.println(mesg + pin + " going down"); 
  for(int fadeValue = 255 ; fadeValue >= 0; fadeValue -=5) {
    analogWrite(pin, fadeValue); 
    delay(lag);                            
  }
}
void ledUp(int pin, int lag){
  Serial.println(mesg + pin + " going up"); 
  for(int fadeValue = 0 ; fadeValue <= 255; fadeValue +=5) { 
    analogWrite(pin, fadeValue);  
    delay(lag);                            
  }
}