#define SIZE 6

int relay[SIZE] = {  

  8, 9, 10, 11, 12, 13 };  // output digital pins to solid state relays  

int pir[SIZE] = {  

  2, 3, 4, 5, 6, 7 };            // input digital pins from Parallax PIR sensor

int time= 1000;

unsigned long startTime[SIZE ] = {  

  0,0,0,0,0,0 };                  // time relay switched ON

unsigned long duration[SIZE ] = { 

  time, time, time, time, time, 20000  };               // for how long in milli-seconds (note this is minimum time)

void setup()

{

  Serial.begin (9600); 

  for (int i=0; i < SIZE; i++)

  {

    pinMode(relay[i], OUTPUT);      

    pinMode(pir[i], INPUT);

  }

}

void loop()

{

  for (int i =0; i<SIZE; i++)

  {

    if (digitalRead(pir[i]) == HIGH)               // check PIR state

    {

      digitalWrite(relay[i], HIGH);                // switch relay ON 

      startTime[i] = millis();

        Serial.print(digitalRead(pir[i]));

  Serial.print(",");

    }

    if ((millis() - duration[i]) >= startTime[i])  // time to switch off ??

    {

      digitalWrite(relay[i], LOW); // switch relay OFF after x

    }

  }

}