Hi there,
So some CSS like this:
.element-class {
position: relative;
}
.element-class:before, .element-class:after {
content: '';
display: block;
position: absolute;
background-color: transparent;
pointer-events: none;
}
.element-class:before {
top: 0;
left:0;
right: 60%;
bottom: 80%;
border-top: 4px solid red;
border-left: 4px solid red;
}
.element-class:after {
top: 80%;
left: 60%;
right: 0;
bottom: 0;
border-bottom: 4px solid red;
border-right: 4px solid red;
}
Give your DIV a class of whatever your want, and swap it for the .element-class
in the CSS above.