#include <LiquidCrystal.h>

#define echoPin1 2
#define trigPin1 3
#define echoPin2 12
#define trigPin2 13
#define buzzer 11
int top = A0;
int tym = A2;

long duration1;
int distance1;
long duration2;
int distance2;

const int rs = 9, en = 8, d4 = 4, d5 = 5, d6 = 6, d7 = 7;
LiquidCrystal lcd(rs, en, d4, d5, d6, d7);

void setup() {
  lcd.begin(16, 2);
  pinMode(trigPin1, OUTPUT);
  pinMode(echoPin1, INPUT);
  pinMode(trigPin2, OUTPUT);
  pinMode(echoPin2, INPUT);
  pinMode(top, INPUT);
  pinMode(tym, INPUT);
  pinMode(buzzer, OUTPUT);
  Serial.begin(9600);
}
void loop() {
  digitalWrite(trigPin1, LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin1, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin1, LOW);
  duration1 = pulseIn(echoPin1, HIGH);
  distance1 = duration1 * 0.034 / 2;

  digitalWrite(trigPin2, LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin2, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin2, LOW);
  duration2 = pulseIn(echoPin2, HIGH);
  distance2 = duration2 * 0.034 / 2;

  int diff = (distance2 - distance1);

  int A = analogRead(top);
  int C = analogRead(tym);

  int a = 0;
  int c = 0;

  if (A < 100) {
    a = 1;
  } else if (A < 200) {
    a = 2;
  } else if (A < 300) {
    a = 3;
  } else if (A < 400) {
    a = 4;
  } else if (A < 500) {
    a = 5;
  } else if (A < 600) {
    a = 6;
  } else if (A < 700) {
    a = 7;
  } else if (A < 800) {
    a = 8;
  } else if (A < 900) {
    a = 9;
  } else if (A < 1000) {
    a = 10;
  } else {
    a = 10;
  }

  if (C < 100) {
    c = 0;
  } else if (C < 200) {
    c = 2;
  } else if (C < 300) {
    c = 5;
  } else if (C < 400) {
    c = 10;
  } else if (C < 500) {
    c = 15;
  } else if (C < 600) {
    c = 30;
  } else {
    c = 60;
  }

  int buff = c * 1000;

  if (diff >= a) {
    delay(buff);
    digitalWrite(buzzer, HIGH);
  } else {
    digitalWrite(buzzer, LOW);
  }

  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Calibrate: ");
  lcd.print(a);
  lcd.print(" cm");
  lcd.setCursor(0, 1);
  lcd.print("timer:");
  lcd.print(c);
  lcd.print(" Seconds");

  Serial.print("Distance1: ");
  Serial.print(distance1);
  Serial.println(" cm");
  Serial.print("Distance2: ");
  Serial.print(distance2);
  Serial.println(" cm");
}