<div class="block">
<div class="line"></div>
</div>
.block {
width: 500px;
height: 500px;
background-color: black;
position: relative;
overflow: hidden;
}
.line {
width: 100%;
height: 50px;
background-color: yellow;
transform: rotate(135deg);
position: absolute;
bottom: 50px;
right: -100px;
}
This Pen doesn't use any external CSS resources.
This Pen doesn't use any external JavaScript resources.