#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27, 20, 4);
int LedPin = 11;
int LedBrigthness;
int ButtonPin1 =2;
int ButtonPin2 = 4;
int Buzer   =    7;
float Tone;



void setup() {
  // put your setup code here, to run once:
pinMode(LedPin, OUTPUT);
pinMode(ButtonPin1, INPUT);
pinMode(ButtonPin2, INPUT);
pinMode(Buzer, OUTPUT);
lcd.init();
lcd.backlight();
Serial.begin(9600);
}

void loop() {
  // put your main code here, to run repeatedly:
  // Serial.print(digitalRead(ButtonPin1));
  
  // Serial.println(digitalRead(ButtonPin2));

if(digitalRead(ButtonPin1)==0){
LedBrigthness  +=5; 
}
if (digitalRead(ButtonPin2)==0){ 
 LedBrigthness -=5;
}

Serial.println(LedBrigthness);
analogWrite(LedPin, LedBrigthness);
if (LedBrigthness>255){
  LedBrigthness=255;
  tone(Buzer, 262, 100);
  lcd.println("Stop Pressing");
  lcd.setCursor(0,1);
  lcd.println("The green button.");
  delay(150);
  lcd.clear();
}
if (LedBrigthness<0){
  LedBrigthness=0;
  tone(Buzer, 150, 100);
  lcd.println("Stop Pressing ");
  lcd.setCursor(0,1);
  lcd.println("The black button.");
  delay(150);
  lcd.clear();
}


}