const int tringger = 24; 
const int echo = 27; 
const int led = 13; 

void setup () {
pinMode(tringger, OUTPUT);
pinMode(echo, INPUT); 
pinMode(led, OUTPUT);
}

void loop() {
long tempo, distancia; 
digitalWrite(tringger, LOW);
delayMicroseconds(2);
digitalWrite(tringger, HIGH);
delayMicroseconds(10);
digitalWrite(tringger, LOW);

tempo = pulseIn(echo, HIGH);


distancia = tempo* 0,034 / 2;


if (distancia > 100) {
digitalWrite(led, HIGH);
} 
else {
digitalWrite(led, LOW);



}
}