console 命令行工具 X clear

console

<section>
  <div class="left-side"></div>
  <div class="content"></div>
  <div class="right-side"></div>
</section>

section {
    display: flex;
    height: 300px;
    width: 500px;
}

.left-side,
.right-side {
    background: #000;
    flex: 0.5;
}

.content {
    flex: 1;
    background: rgb(190, 51, 51);
}