greet.js

let timeNow = new Date();
let currentHour = timeNow.getHours();
let count = 1;
let idk = null

function greet(){
  if (count == 10){
    clearInterval(idk);
  }
  if ((5 <= currentHour) && (currentHour <= 10)){
    console.log("Good morning");
  }else if ((12 <= currentHour) && (currentHour <= 16)){
    console.log("Good afternoon");
  }else if ((17 <= currentHour) && (currentHour <= 21)){
    console.log("Good evening");
  }else if ((22 <= currentHour) && (currentHour <= 4)){
    console.log("Good night");
  }
  console.log(count);
  count++;
  
}

idk = setInterval(greet, 500);