#include <Adafruit_NeoPixel.h>
const byte pir_pin =13;
const byte led_num=16;
const byte data_pin=15;
Adafruit_NeoPixel pixels = Adafruit_NeoPixel(led_num, data_pin, NEO_GRB + NEO_KHZ800);



void setup() {
 // put your setup code here, to run once:
  Serial.begin(115200);
  pinMode(pir_pin, INPUT);
  pixels.begin();
  pixels.show();

 
  
}

void loop() {

  Serial.println(digitalRead(pir_pin));
  if(digitalRead(pir_pin)==1){
    generate_random_pattern();
    
    
  }
  // put your main code here, to run repeatedly:
  delay(10); // this speeds up the simulation
}

void generate_random_pattern(){
  byte pattern=random(1,3);
  byte b=random(0,255);
  byte g=random(0,255);
  byte r =random(0.255);
  Serial.print("patternNumber");
  Serial.println(pattern);
  if(pattern==1){
    for(int i=0;i<led_num;i++){
      pixels.setPixelColor(i,r,g,b);
      pixels.show();
      delay(50);

    }
     for(int i=led_num-1;i>=0;i--){
      pixels.setPixelColor(i,0,0,0);
      pixels.show();
      delay(50);

    }
    
     
  }
  else if(pattern==2){
    for(int i =0;i<=255;i++){
      for(int j =0;j<led_num;j++){
        pixels.setPixelColor(j,0,i,i);
      }
      pixels.show();
      delay(10);

    }
    
      
    
    for(int i=255;i>=0;i--){
      for(int j =0;j<led_num;j++){
        pixels.setPixelColor(j,0,i,i);
      }
      pixels.show();
      delay(10);

    }
    
  }  
    }