Blind Hat Helper

// defines pins numbers
const int triger = 9;
const int echo = 10;
const int Pizzo = 8;
const int Threshold = 45;
// defines variables
long duration;
int distance;
void setup() {
pinMode(triger, OUTPUT); // Sets the trigPin as an Output
pinMode(echo, INPUT); // Sets the echoPin as an Input
pinMode(Pizzo, OUTPUT);
Serial.begin(9600); // Starts the serial communication
}
void loop() {
// Clears the trigPin
digitalWrite(triger, LOW);
delayMicroseconds(2);
// Sets the trigPin on HIGH state for 10 micro seconds
digitalWrite(triger, HIGH);
delayMicroseconds(10);
digitalWrite(triger, LOW);
// Reads the echoPin, returns the sound wave travel time in microseconds
duration = pulseIn(echo, HIGH);
// Calculating the distance
distance= duration*0.034/2;
// Prints the distance on the Serial Monitor
Serial.print("Distance: ");
Serial.println(distance);

if(distance <= Threshold)
tone(Pizzo, 1500);

else
noTone(Pizzo);

}