Distance sensor with for loop

Distance_sensor_with_for_loop

#include <FastLED.h>

#define NUM_LEDS 200
#define datapin 6
#define LED_TYPE WS2811

CRGB leds[NUM_LEDS]; 

const int trigPin = 10;
const int echoPin = 11;
// defines variables
long duration;
int distance;


 
void setup() {
  
FastLED.addLeds<WS2811, datapin>(leds, NUM_LEDS);

pinMode(trigPin, OUTPUT); // Sets the trigPin as an Output
pinMode(echoPin, INPUT); // Sets the echoPin as an Input
Serial.begin(9600); // Starts the serial communication
}


void loop() {

  //distance code
  
digitalWrite(trigPin, LOW);
delayMicroseconds(2);
// Sets the trigPin on HIGH state for 10 micro seconds
digitalWrite(trigPin, HIGH);
delayMicroseconds(10);
digitalWrite(trigPin, LOW);
// Reads the echoPin, returns the sound wave travel time in microseconds
duration = pulseIn(echoPin, HIGH);
// Calculating the distance
distance= duration*0.034/2;
// Prints the distance on the Serial Monitor
Serial.print("Distance: ");
Serial.println(distance);


// main code 



 if (distance < 40) {

  for (int i =0; i < 200; i++)
  {
  
  fill_solid(leds, NUM_LEDS, CRGB(255, 255, 0));

  FastLED.show(); 
  
   delay (10); 
   
 }

 }
 else { 
  
  fill_solid(leds, NUM_LEDS, CRGB::Black); 
  FastLED.show(); 
 }
}