// Homepage.php
<div class="hero-screen-border full"></div>
<div class="hero-screen-border left"></div>
<div class="hero-screen-border right"></div>

// hero scss
.hero-screen-border {
	&.full {
		position:  absolute;
    	top: 7.5%;
    	left: 1.5%;
    	right: 1.5%;
    	bottom: 1.5%;
    	border: 3px solid #eee;
   		border-top:  transparent;
	}

	&.left {
		position:  absolute;
    	top: 7.5%;
    	left: 1.5%;
    	right: 94%;
    	border-top: 3px solid #eee;
	}

	&.right {
		position:  absolute;
    	top: 7.5%;
    	left: 94%;
    	right: 1.5%;
    	border-top: 3px solid #eee;
	}
}