如何在每次单击按钮时更改颜色？

<button id="myButton">点击我</button>

var button = document.getElementById("myButton");
button.addEventListener("click", changeColor);

function changeColor() {
  var randomColor = getRandomColor(); // 获取一个随机颜色
  button.style.backgroundColor = randomColor; // 修改按钮的背景颜色
}

function getRandomColor() {
  var letters = "0123456789ABCDEF";
  var color = "#";
  for (var i = 0; i < 6; i++) {
    color += letters[Math.floor(Math.random() * 16)];
  }
  return color;
}

button {
  padding: 10px 20px;
  background-color: #ccc;
  color: #fff;
  border: none;
  cursor: pointer;
}