如何随机化在10秒、20秒、30秒内一致显示的3个div的顺序

<div id="div1">Div 1</div>
<div id="div2">Div 2</div>
<div id="div3">Div 3</div>

// 随机化div的顺序
function randomizeDivOrder() {
  var randomNum = Math.random();
  
  if (randomNum < 0.33) {
    document.getElementById("div1").style.display = "block";
    document.getElementById("div2").style.display = "none";
    document.getElementById("div3").style.display = "none";
  } else if (randomNum >= 0.33 && randomNum < 0.66) {
    document.getElementById("div1").style.display = "none";
    document.getElementById("div2").style.display = "block";
    document.getElementById("div3").style.display = "none";
  } else {
    document.getElementById("div1").style.display = "none";
    document.getElementById("div2").style.display = "none";
    document.getElementById("div3").style.display = "block";
  }
}

// 设置显示时间
setTimeout(randomizeDivOrder, 10000); // 10秒
setTimeout(randomizeDivOrder, 20000); // 20秒
setTimeout(randomizeDivOrder, 30000); // 30秒