button.html

<a href="http://example.com" class="button">Click This Button!</a>

functions.php

genesis_register_sidebar( array(
	'id'          => 'after-nav',
	'name'        => __( 'After Nav', 'wpsites' ),
	'description' => __( 'This is the after header section.', 'wpsites' ),
) );

add_action( 'genesis_after_header', 'wpsites_widget_over_image'  ); 
function wpsites_widget_over_image() {

    if ( ! is_front_page() )
    	return;

    genesis_widget_area( 'after-nav', array(
		'before' => '<div class="after-nav widget-area">',
		'after'  => '</div>',
    ) );

}

style.css

.after-nav {
    background-image: url('images/bg.jpg');
    background-repeat: repeat;
}

.after-nav  .widget_text  {
	color: #fff;
	font-family: Georgia;
	font-size: 20px;
	text-align: center;
	padding-top: 50px;
	padding-bottom: 20px;
}

.after-nav .widget-title {
	font-size: 25px;
	color: #fff;
	text-align: center;
}

.after-nav .button {
    background-color: #1E8CBE;
	margin-top: 0px;
	color: #fff;
	width: 280px;
}

.after-nav .button:hover {
    background-color: orange;
	color: #fff;
}