console 命令行工具 X clear

console

<div class="box">
</div>

<div class="box1">
</div>

.box{
    width: 0px;
    height: 0px;
    border-style: solid;
    border-width: 0 0 80px 6px;
    border-color: transparent transparent transparent gainsboro;
}

.box1{
    width: 0px;
    height: 0px;
    border-style: solid;
    border-width: 0 6px 80px 0;
    border-color: transparent gainsboro transparent transparent;
}