#include <LiquidCrystal.h>
LiquidCrystal lcd(12,11,10,9,8,7); // RS, E , D4..D7

byte hertz[8] = {
  0b00000,
  0b01010,
  0b11111,
  0b11111,
  0b11111,
  0b01110,
  0b00100,
  0b00000
  
};
bool m = false;
void setup() {
  lcd.begin(16,2);
  pinMode(6, INPUT_PULLUP);
  pinMode(5, INPUT_PULLUP);
  pinMode(4, INPUT_PULLUP);
  pinMode(3, INPUT_PULLUP);
  pinMode(2, INPUT_PULLUP);
  lcd.createChar(1, hertz);
  randomSeed(analogRead(A1));

}

int counter = 0;

void loop() {
  lcd.setCursor(0,0);
  lcd.print("counter:");
  if(digitalRead(6) == 0){
    
    counter ++;
    m = false;
  }
  if(digitalRead(5) == 0){
    
    counter --;
    m = false;
  }
  if(digitalRead(4) == 0){
    
    counter = 0;
    m = false;
  }
  if(digitalRead(3) == 0){
    
    counter = random(1,10);
    m = false;
  }
  if(digitalRead(2) == 0){
    m = true;

  }
  if(m == true){
    lcd.setCursor(0,1);
    lcd.write(1);
  }
  else{
      lcd.setCursor(0,1);
      lcd.print(counter);


  }

  delay(100);
  lcd.clear();
  
}