.box {
width: 100%;
display: flex;
}
.item {
width: 0%;
flex: 1;
height: 50px;
}
.item1 {
width: 20px;
height: 50px;
}
.item2 {
width: 20px;
height: 50px;
}
</style>
</head>
<div class="box">
<div class="item1" style="background-color: red">111</div>
<div class="item" style="background-color: blue">111</div>
<div class="item" style="background-color: black">111</div>
<div class="item" style="background-color: green">111</div>
<div class="item" style="background-color: pink">111</div>
<div class="item2" style="background-color: yellow">111</div>
</div>
<body>