#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27, 16, 2);


char strArr1[] = "HI! HELLO! YIPPEEEE!! SEE YOU ON MY SITE       ";
char strArr2[] = "NOOOO! BOOO, COME BACK !! T_T       ";


int pirValue; 
int pirPin = 8; 

void setup() {
  // put your setup code here, to run once:
  lcd.init();
  lcd.backlight();

  // printing to lcd
  lcd.setCursor(0,0);
  lcd.print(" CHXSHIRE22.COM ");
  Serial.begin(9600);
  
  // PIR pin setup
  pinMode(pirPin, INPUT);
}

void loop() {
  // put your main code here, to run repeatedly:

  if(digitalRead(pirPin) == HIGH){
    Serial.print("DETECTED");
    Serial.print("\n");
    lcdScrollPrint(strArr1);
  }else{
    lcdScrollPrint(strArr2);
  }
}

  // for loop to print my intro character by character onto lcd screen for scroll. 
  // idea is that the screen refreshes and first prints the whole string, then the next refresh print the string minus the current first character
void lcdScrollPrint(char strArr[]){
  int strArrLength = strlen(strArr);
  for(int i = 0; i < strArrLength; i++){
    lcd.setCursor(0,1);
    String printing = "";
    for (int j = 0; j < 16; j++) {
      int index = (i + j) % strArrLength;
      printing += strArr[index];
    }
    lcd.print(printing);
    delay(300);
  }
}