[questions] if the distance is less than 5 cm, switch off the LED on pin 5

[vongomben]

How do we do that?

this is the referral code

/*

  Example taken from Seeestudio Wiki
  for the Grove Ultrasonic Ranger
  https://wiki.seeedstudio.com/Grove-Ultrasonic_Ranger/
  adapted to work with Arduino Grove Carrier (on MKR1010)

  https://www.arduino.cc/en/Guide/MKRConnectorCarrier
  by Davide Gomba

  Library here
  https://github.com/Seeed-Studio/Seeed_Arduino_UltrasonicRanger/archive/master.zip

  Install Library Sketch>include Library> Add Zip Library
*/




#include "Ultrasonic.h"

int led = 5;

Ultrasonic ultrasonic(0);

void setup()
{
  Serial.begin(9600);
  pinMode(led, OUTPUT);
}
void loop()
{
  long RangeInInches;
  long RangeInCentimeters;

  /* Serial.println("The distance to obstacles in front is: ");
    RangeInInches = ultrasonic.MeasureInInches();
    Serial.print(RangeInInches);//0~157 inches
    Serial.println(" inch");
    delay(250);
  */
  RangeInCentimeters = ultrasonic.MeasureInCentimeters(); // two measurements should keep an interval
  Serial.print(RangeInCentimeters);//0~400cm
  Serial.print(" cm");
  int value = map(RangeInCentimeters, 0, 30, 0, 255);
  Serial.print(" - ");
  Serial.println(value);
  analogWrite(led, value);

  delay(25);
}