#include <HCSR04.h>
UltraSonicDistanceSensor ojos(2,5);
void setup() {
Serial.begin(9600);
pinMode(1,OUTPUT);
}

void loop() {
Serial.println(ojos.measureDistanceCm());
delay(200);
if (ojos.measureDistanceCm()<40){
digitalWrite(1,HIGH);
}
else{
digitalWrite(1, LOW);
}
}