You can do it something like this:
<style>
.background {
background-color: #BCBCBC;
width: 100px;
height: 50px;
padding: 0;
margin: 0
}
.line1 {
width: 112px;
height: 47px;
border-bottom: 1px solid red;
-webkit-transform:
translateY(-20px)
translateX(5px)
rotate(27deg);
position: absolute;
/* top: -20px; */
}
.line2 {
width: 112px;
height: 47px;
border-bottom: 1px solid green;
-webkit-transform:
translateY(20px)
translateX(5px)
rotate(-26deg);
position: absolute;
top: -33px;
left: -13px;
}
</style>
<div class="background">
<div class="line1"></div>
<div class="line2"></div>
</div>
Here is a jsfiddle.
Improved version of answer for your purpose.