//YWROBOT
//Compatible with the Arduino IDE 1.0
//Library version:1.1
#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27,20,2);  // set the LCD address to 0x27 for a 16 chars and 2 line display

byte line_1[8] = {
  B00001,
  B00001,
  B00001,
  B00001,
  B00001,
  B00001,
  B00001,
};

byte line_2[8] = {
  B00011,
  B00011,
  B00011,
  B00011,
  B00011,
  B00011,
  B00011,
};

byte line_3[8] = {
  B00111,
  B00111,
  B00111,
  B00111,
  B00111,
  B00111,
  B00111,
};

byte line_4[8] = {
  B01111,
  B01111,
  B01111,
  B01111,
  B01111,
  B01111,
  B01111,
};

byte line_5[8] = {
  B11111,
  B11111,
  B11111,
  B11111,
  B11111,
  B11111,
  B11111,
};

void setup()
{
  lcd.init();                      // initialize the lcd
  // Print a message to the LCD.
  lcd.backlight();
  //lcd.setCursor(2,0);
  //lcd.print("Hello, world!");
  //lcd.setCursor(2,1);
  //lcd.print("Hello Wokwi!");

}

enum {CHAR_0};

void test() {
  lcd.clear();
  
  lcd.createChar(0, line_1);
  lcd.createChar(1, line_2);
  lcd.createChar(2, line_3);
  lcd.createChar(3, line_4);
  lcd.createChar(4, line_5);

  lcd.setCursor(0,0);
  for(int i = 0;i<5);i++ ) {
    lcd.write((byte) i);
    millis(1000);
  }
  while(1)
    ;
  
  lcd.setCursor(0,0);
  lcd.write((byte) CHAR_0);  

  lcd.setCursor(1,0);
  lcd.write((byte) CHAR_0);  

  // // col, row
  // //lcd.setCursor(2,0);
  // lcd.setCursor(0,0);
  // lcd.write('a');
  // lcd.setCursor(15, 1);
  // lcd.write('b');
  // delayMicroseconds(2000);   // this is just wrong
  while(1);

}

// https://docs.arduino.cc/learn/electronics/lcd-displays

void loop() {

   test(); 
  



}