int dndState ;
int dndStatePin = 3;

int bellState =LOW;
int bellPin = 6;

int bellTrigger = 7;// Mosfet output for bell circuit

void setup() {
pinMode(dndStatePin, INPUT);
pinMode(bellPin, INPUT);
pinMode(bellTrigger, OUTPUT);
//Serial.begin(9600);//All serial for debuging purpose
}
void loop() {
dndState = digitalRead(dndStatePin);
while(dndState ==LOW) {
dndMode();
digitalWrite(4, LOW);
dndState = digitalRead(dndStatePin);
}
bellState =digitalRead(bellPin);
if(bellState == LOW){
 digitalWrite(bellTrigger, HIGH);
 delay(1000);
 digitalWrite(bellTrigger, LOW);
 delay(2000);
}
  }
void dndMode() {
  digitalWrite(4, HIGH);//DND Mode Indicator for debuging
  //delay(100);
 // Serial.print(dndState);
 //Serial.println("  DND MODE ON");
}