/*
 * This ESP32 code is created by esp32io.com
 *
 * This ESP32 code is released in the public domain
 *
 * For more detail (instruction and wiring diagram), visit https://esp32io.com/tutorials/esp32-neopixel-led-strip
 */

#include <Adafruit_NeoPixel.h>

#define PIN_NEO_PIXEL 27  // The ESP32 pin GPIO16 connected to NeoPixel
#define NUM_PIXELS 16     // The number of LEDs (pixels) on NeoPixel LED strip

Adafruit_NeoPixel NeoPixel(NUM_PIXELS, PIN_NEO_PIXEL, NEO_GRB + NEO_KHZ800);

void setup() {
  NeoPixel.begin();  // initialize NeoPixel strip object (REQUIRED)
  Serial.begin(9600);
  Serial.println(" ");

}

void loop() {
  if (Serial.available())
  {
    String color = Serial.readString();
    color.trim();
    if(color=="red")
    {
       NeoPixel.clear();
       for (int pixel = 0; pixel < NUM_PIXELS; pixel++) {           
    NeoPixel.setPixelColor(pixel, NeoPixel.Color(255,0, 0));    
    }
     NeoPixel.show();
     delay(2000);
     NeoPixel.clear();
  }
  else if(color=="error")
     {
      NeoPixel.clear();
       for (int pixel = 0; pixel < NUM_PIXELS; pixel++) {           
    NeoPixel.setPixelColor(pixel, NeoPixel.Color(255,0, 0));    
     }
     for(int i=0;i<=3;i++)
     {
      NeoPixel.show();
     delay(1000);
     NeoPixel.clear();
     NeoPixel.show();
     delay(1000);
     NeoPixel.fill(NeoPixel.Color(255,0, 0));
     NeoPixel.show();
     delay(1000);
     }
     }
     else if(color=="Color")
     {
      for(int i=0;i<=255;i+=10)
      {

                 NeoPixel.fill(NeoPixel.Color(i,0,0));
                 NeoPixel.show();
                 delay(500);
                 NeoPixel.clear();

                 NeoPixel.fill(NeoPixel.Color(0,i,0));
                 NeoPixel.show();
                 delay(500);
                 NeoPixel.clear();
                 
                 NeoPixel.fill(NeoPixel.Color(0,0,i));
                 NeoPixel.show();
                 delay(500);
                 NeoPixel.clear();
                 
                 NeoPixel.fill(NeoPixel.Color(i,i,0));
                 NeoPixel.show();
                 delay(500);
                 NeoPixel.clear();
                 
                 NeoPixel.fill(NeoPixel.Color(0,i,i));
                 NeoPixel.show();
                 delay(500);
                 NeoPixel.clear();
                 
                 NeoPixel.fill(NeoPixel.Color(i,0,i));
                 NeoPixel.show();
                 delay(500);
                 NeoPixel.clear();
                 
                 NeoPixel.fill(NeoPixel.Color(i,i,i));
                 NeoPixel.show();
                 delay(500);
                 NeoPixel.clear();
      }

         }
         else if(color=="half")
        {
          for(int i=0;i<=2;i++)
          {
            for (int pixel = 0; pixel < NUM_PIXELS/2; pixel++) {           // for each pixel
    NeoPixel.setPixelColor(pixel, NeoPixel.Color(0, 0, 255));  // it only takes effect if pixels.show() is called
  }
  NeoPixel.show();  // update to the NeoPixel Led Strip
  delay(1000);
  NeoPixel.clear();
    for (int pixel =8; pixel < NUM_PIXELS; pixel++) {           // for each pixel
    NeoPixel.setPixelColor(pixel, NeoPixel.Color(255, 0, 0));  // it only takes effect if pixels.show() is called
  }
  NeoPixel.show();  // update to the NeoPixel Led Strip
  delay(1000); 
  NeoPixel.clear(); 
        }
            NeoPixel.show();
        }
        else if(color=="smile")
        {
        NeoPixel.setPixelColor(2,(NeoPixel.Color(0,0,255)));
        NeoPixel.show();
        NeoPixel.setPixelColor(14,(NeoPixel.Color(0,0,255)));
        NeoPixel.show();
        for(int pixel=5;pixel<12;pixel++)
        {
        NeoPixel.setPixelColor(pixel,(NeoPixel.Color(255,255,0)));
        NeoPixel.show();  // set all pixel colors to 'off'. It only takes effect if pixels.show() is called
        }
        delay(2000);
        NeoPixel.clear();
        }
        else if(color=="roll")
        {
          int x=0,y=0;
          for(int i=0;i<=2;i++)
          {
            for (int pixel = 0; pixel < NUM_PIXELS; pixel++) {
              x=random(256);
              y=random(256);
    NeoPixel.setPixelColor(pixel, NeoPixel.Color(x,x-y, y));  
    NeoPixel.show();
      delay(100);
      NeoPixel.clear();
        }
        NeoPixel.show();
        }
        }
}
}