写一个简单的vue代码

<template>
  <div>
    <h1>{{ message }}</h1>
    <button @click="changeMessage">Change Message</button>
  </div>
</template>
<script>
export default {
  data() {
    return {
      message: "Hello, Vue!"
    }
  },
  methods: {
    changeMessage() {
      this.message = "Hello, World!";
    }
  }
}
</script>
<style>
h1 {
  color: blue;
}
</style>