#define trigerPin 12
#define echoPin 13
#define ledPin 2
#define bulbPin 3
#define speakerPin 10
#define pitch 262
#define inputPin 11
double time,dis;
int ps=LOW;
int x=0;
void setup(){
  Serial.begin(9600);
  pinMode(trigerPin,OUTPUT);
  pinMode(echoPin,INPUT);
  pinMode(bulbPin,OUTPUT);
  pinMode(ledPin,OUTPUT);
  pinMode(inputPin,INPUT);
  pinMode(speakerPin,OUTPUT);
}
void loop(){
  digitalWrite(trigerPin,LOW);
  delayMicroseconds(2);
  digitalWrite(trigerPin,HIGH);
  delayMicroseconds(10);
  digitalWrite(trigerPin,LOW);
  delayMicroseconds(2);
  time=pulseIn(echoPin,HIGH);
  dis=(time/2)*0.0343;
  if(dis<200){
    digitalWrite(ledPin,HIGH);
    tone(speakerPin,pitch);
    delay(300);
    digitalWrite(ledPin,LOW);
    noTone(speakerPin);
    delay(300);
  }
  else{
    digitalWrite(ledPin,LOW);
    noTone(speakerPin);
  }
  x=digitalRead(inputPin);
  if(x==HIGH){
    digitalWrite(bulbPin,HIGH);
    delay(500);
    digitalWrite(bulbPin,LOW);
    delay(500);
    if(ps==LOW){
      ps=HIGH;
    }
  }
else{
  digitalWrite(bulbPin,LOW);
  if(ps==HIGH){
    ps=LOW;
  }
}
}