#include <LiquidCrystal.h>

#define DT 10
#define SW 13

int counter = 0;  // percentage (0–100)

LiquidCrystal lcd(12, 11, 5, 4, 3, 2);

// Custom characters (jouw blokjes)
byte char1[] = { B00000,B00000,B00000,B00000,B00000,B00000,B00000,B00000 };
byte char2[] = { B10000,B10000,B10000,B10000,B10000,B10000,B10000,B10000 };
byte char3[] = { B11000,B11000,B11000,B11000,B11000,B11000,B11000,B11000 };
byte char4[] = { B11100,B11100,B11100,B11100,B11100,B11100,B11100,B11100 };
byte char5[] = { B11110,B11110,B11110,B11110,B11110,B11110,B11110,B11110 };
byte char6[] = { B11111,B11111,B11111,B11111,B11111,B11111,B11111,B11111 };

void setup(){
  pinMode(DT, INPUT_PULLUP);
  pinMode(SW, INPUT_PULLUP);

  lcd.begin(16, 2);
  lcd.createChar(0, char1);
  lcd.createChar(1, char2);
  lcd.createChar(2, char3);
  lcd.createChar(3, char4);
  lcd.createChar(4, char5);
  lcd.createChar(5, char6);

  lcd.clear();
}

void loop(){

  //  tellen
  if(digitalRead(DT) == LOW){
    if(counter < 100) counter++;
    delay(150);
  }

  if(digitalRead(SW) == LOW){
    if(counter > 0) counter--;
    delay(150);
  }

  updateLCD();
}

void updateLCD() {
  lcd.setCursor(0,0);
  lcd.print("   ");       
  lcd.print(counter);
  lcd.print("%        ");

  int totalBlocks = 16;           
  float filled = (counter / 100.0) * totalBlocks;  
  int full = filled;               
  int rest = (filled - full) * 5; 

  lcd.setCursor(0,1);

  for(int i=0; i < full; i++){
    lcd.write(byte(5));   
  }

  if(full < totalBlocks){
    lcd.write(byte(rest));  
    full++;
  }

  while(full < totalBlocks){
    lcd.write(byte(0));  
    full++;
  }
}