#include <Adafruit_NeoPixel.h>
#define neo 4
#define numpixel  17
#define trig 6
#define echo 5
#define relay 7
#define sw 3
int mtrstate = LOW;
Adafruit_NeoPixel pixels(numpixel, neo, NEO_GRB + NEO_KHZ800);
long int duration,distance;

void setup() {
  pixels.clear();
  // put your setup code here, to run once:
#if defined(__AVR_ATtiny85__) && (F_CPU == 16000000)
  clock_prescale_set(clock_div_1);
#endif
pixels.begin();
Serial.begin(9600);
pinMode(trig,OUTPUT);
pinMode(echo,INPUT);
pinMode(relay,OUTPUT);
digitalWrite(relay,mtrstate);
pinMode(sw,INPUT);
}


void loop() {
  // put your main code here, to run repeatedly:
  dist();
  if(distance<25)
  {
    mtrstate = LOW;
    digitalWrite(relay,mtrstate);
  }
if(mtrstate == LOW)
{

  if(distance<70)
  {
    
    for(int i=17;i>-1;i--)
      {
      pixels.setPixelColor(i,pixels.Color(0,100,0));
      pixels.show();
      //delay(10);
      }
  }
  if(distance>70 && distance<140)
  {
    for(int i=19;i>12;i--)
      {
       pixels.setPixelColor(i,pixels.Color(0,0,0));
       pixels.show();
       //delay(10);
      }
    for(int i=13;i>-1;i--)
      {
       pixels.setPixelColor(i,pixels.Color(20,80,0));
       pixels.show();
       //delay(10);
      }
  }
  if(distance>140 && distance<210)
  {
    for(int i=13;i>9;i--)
      {
       pixels.setPixelColor(i,pixels.Color(0,0,0));
       pixels.show();
       //delay(10);
      }
    for(int i=10;i>-1;i--)
      {
      pixels.setPixelColor(i,pixels.Color(40,60,20));
      pixels.show();
      //delay(10);
      }
  }
  if(distance>210 && distance<280)
  {
    for(int i=10;i>6;i--)
      {
       pixels.setPixelColor(i,pixels.Color(0,0,0));
       pixels.show();
       //delay(10);
      }
    for(int i=7;i>-1;i--)
      {
      pixels.setPixelColor(i,pixels.Color(60,40,0));
      pixels.show();
      //delay(10);
      }
  } 
  if(distance>280 && distance<350)
  {
    for(int i=7;i>3;i--)
      {
       pixels.setPixelColor(i,pixels.Color(0,0,0));
       pixels.show();
       //delay(10);
      }
    for(int i=4;i>-1;i--)
    {
      pixels.setPixelColor(i,pixels.Color(80,20,0));
      pixels.show();
      //delay(10);
    }
  }
  if(distance>=350)
  {
    
    for(int i=4;i>1;i--)
      {
       pixels.setPixelColor(i,pixels.Color(0,0,0));
       pixels.show();
       //delay(10);
      }
    for(int i=1;i>-1;i--)
      {
      pixels.setPixelColor(i,pixels.Color(100,0,0));
      pixels.show();
      //delay(10);
      }
  }

}

int va = digitalRead(sw);
if(va == HIGH)
{
  mtrstate = !mtrstate;
}
digitalWrite(relay,mtrstate);
if(mtrstate == HIGH)
{

  dist();
  int v = map(distance,15,400,17,0);
 // Serial.println(v);
 // delay(10);
  for(int i=0;i<v;i++){
    Serial.println(i);
    pixels.setPixelColor(i,pixels.Color(0,0,100));
    pixels.show();
    delay(10);
  }
  for(int i=v;i<17;i++)
  {
    pixels.setPixelColor(i,pixels.Color(0,0,0));
    pixels.show();
    delay(10);
  }
}



}



void dist(void)
{
  digitalWrite(trig,HIGH);
  delayMicroseconds(10);
  digitalWrite(trig,LOW);
  duration = pulseIn(echo,HIGH);
  distance = duration*0.034/2;
 // Serial.print("dist=");
  //Serial.println(distance);
 // delay(500);
}