Office project, light guiding to door

Help for a nice guy

const int NUMBER_OF_ZONES = 19;
const int DOOR_OPEN_MS = 5 * 1000; // 5 seconds
const int ZONE_ON_MS = 10 * 60 * 1000; // 10 minutes

unsigned int zoneLastOn[NUMBER_OF_ZONES] = {};

void loop() {
    //this is the multitasking part
    //we just check the time that has passed since
    //we last wanted it on and act accordingly
    for (int i=0; i<NUMBER_OF_ZONES; i++) {
        //if the last time we set zone on
        //plus the amount of time we want it on
        //is greater than the the actual time
        //it's time to shut it off
        if (zoneLastOn[i] + ZONE_ON_MS > millis()) {
            digitalWrite(i + 2, LOW); //shift zone to pin
        }else{ //else we want it on
            digitalWrite(i + 2, HIGH);
        }
    }
}

//replace digitalWrite in the original sketch with this
//not sure you really ever want to tell the zone to go off?
//what would happen in that case?
//I will assume onOrOFf to be true always
void enableZone(int zone, int onOrOff)
{
    //since this method is called
    //based on a message from the app
    //we want the zone to be on from now until ZONE_ON_MS
    //has passed,
    //and all the preceeding zones
    int middleZone = NUMBER_OF_ZONES / 2;
    if (zone < middleZone) {
        for (int i=0; i<=zone; i++) {
            zoneLastOn[i] = millis();
        }
    } else {
        for (int i=zone; i>=0; i--) {
            zoneLastOn[i] = millis();
        }
    }
}