function generateLotto() {

  const numbersBox = document.getElementById("numbers");
  numbersBox.innerHTML = "";

  for(let set = 1; set <= 5; set++){

    const numbers = [];

    while(numbers.length < 6){
      const randomNum = Math.floor(Math.random() * 45) + 1;

      if(!numbers.includes(randomNum)){
        numbers.push(randomNum);
      }
    }

    numbers.sort((a,b)=>a-b);

    const row = document.createElement("div");
    row.style.display="flex";
    row.style.alignItems="center";
    row.style.marginBottom="10px";

    const label = document.createElement("div");
    label.textContent = set + "번 추천 : ";
    label.style.width="90px";
    label.style.fontWeight="bold";

    row.appendChild(label);

    numbers.forEach(num => {
      const ball = document.createElement("div");
      ball.className = `ball ${getBallClass(num)}`;
      ball.textContent = num;
      ball.style.marginRight="5px";
      row.appendChild(ball);
    });

    numbersBox.appendChild(row);

  }

}