#include <LiquidCrystal_I2C.h>
 
#define I2C_ADDR    0x27
#define LCD_COLUMNS 20
#define LCD_LINES   4
#define VERT_PIN A0
#define HORZ_PIN A1
#define SEL_PIN  2
#define LED_PIN 6 
#define LED_GREEN 5
#define LED_YELLOW 4

LiquidCrystal_I2C lcd(I2C_ADDR, LCD_COLUMNS, LCD_LINES);

void setup() {
  pinMode(VERT_PIN, INPUT);
  pinMode(HORZ_PIN, INPUT);
  pinMode(SEL_PIN, INPUT_PULLUP);
  pinMode(LED_PIN, OUTPUT);
  pinMode(LED_GREEN, OUTPUT);
  pinMode(LED_YELLOW, OUTPUT);
  Serial.begin(9600);
  digitalWrite(LED_PIN,LOW);
  lcd.init();
  lcd.backlight();
}

void loop() {
  int vert = analogRead(VERT_PIN);
  int horz = analogRead(HORZ_PIN);
  bool selPressed = digitalRead(SEL_PIN) == LOW;
  // horz goes from 0 (right) to 1023 (left)
  // vert goes from 0 (bottom) to 1023 (top)
  if (selPressed) {
    digitalWrite(LED_PIN, HIGH);
  }
  else {
    digitalWrite(LED_PIN,LOW);
  }
  if (horz > 600) {
    digitalWrite(LED_GREEN,HIGH);
  } else {
    digitalWrite(LED_GREEN,LOW);
  }
  if (vert > 600) {
    digitalWrite(LED_YELLOW,HIGH);
  } else {
    digitalWrite(LED_YELLOW,LOW);
  }
  lcd.setCursor(0, 0);
  lcd.print(horz);
  lcd.setCursor(0,1);
  lcd.print(vert);
  delay(500);
  lcd.clear();
}