#include
LiquidCrystal lcd(3, 2, 4, 5, 6, 7);

#define lpg_sensor 18
#define buzzer 13

void setup()
{
pinMode(lpg_sensor, INPUT);
pinMode(buzzer, OUTPUT);
lcd.begin(16, 2);
lcd.print("LPG Gas Detector");
lcd.setCursor(0,1);
lcd.print("Circuit Digest");
delay(2000);
}

void loop()
{
if(digitalRead(lpg_sensor))
{
digitalWrite(buzzer, HIGH);
lcd.clear();
lcd.print("LPG Gas Leakage");
lcd.setCursor(0, 1);
lcd.print(" Alert ");
delay(400);
digitalWrite(buzzer, LOW);
delay(500);
}

else
{
digitalWrite(buzzer, LOW);
lcd.clear();
lcd.print(" No LPG Gas ");
lcd.setCursor(0,1);
lcd.print(" Leakage ");
delay(1000);
}
}