LED Matrix 32x16 RGB & Ultrasonic Sensor

1//SYNERGYA 32x16 
2//LED MATRIX WITH ULTRASONIC SENSOR
3//by Camila  Cirne, Francisco Luz, Gislaine Reis, Pedro Coelho and Thiago Arajo
4
5#include  <Ultrasonic.h> // Add the Ultrasonic by Erick Simes' library
6#include "FastLED.h"  // Add FastLED library
7
8#define NUM_LEDS 512 // set the number of LEDS (for  1 matrix 256, for 2 matrices 512 and so on...)
9#define DATA_PIN 3 // set the  pin number from the Arduino board
10CRGB leds[NUM_LEDS];
11
12const int someoneArrivedPin  = 7;  // set the TRIG terminal in the Arduino board from the Ultrasonic sensor
13const  int someoneLeftPin = 6; // set the ECHO terminal in the Arduino board from the Ultrasonic  sensor
14
15void setup() {
16  delay(2000);
17  FastLED.addLeds<WS2812B, DATA_PIN,  RGB>(leds, NUM_LEDS); // WS2812B is the matrix model were using
18  FastLED.setBrightness(150);  // Setup the general brightness (0-255)
19  FastLED.clear();
20  Serial.begin(9600);  // Start the serial port to initialize the ultrasonic sensor
21  pinMode(someoneArrivedPin,  OUTPUT);  // set OUTPUT and INPUT accordingly to the ultrasonic sensor library
22  pinMode(someoneLeftPin, INPUT);
23}
24
25Ultrasonic ultrasonic(someoneArrivedPin,  someoneLeftPin);
26
27int randomInt;
28int randomInt2;
29
30void loop() {
31  for(int i = 0; i < 10; i++){ // Outerloop
32    for(int j = 0; j < 1000; j++){  // TURN LEDS ON - Innerloop
33        if (ultrasonic.read() > 10 and ultrasonic.read()  <=100){ // Return the distance in cm in the if condition
34          randomInt  = (rand()%512); // random intenger that chooses the leds which will be turn on
35          randomInt2 = (rand()%256); // random intenger that chooses the color Hue  of the given leds
36          leds[randomInt].setHue(randomInt2);
37          FastLED.show();
38        }
39     } 
40    for(int k = 512; k > 0; k--){ // TURN LEDS OFF - 2nd  Innerlooop
41      leds[k] = CRGB::Black;
42      FastLED.show();
43    }
44  }
45}