Logo in Header of Black Line Theme

Can someone give me exact instructions for how to insert a logo into my header for black line theme. I have tried and tried but keep making a mess.

<div class="main">
		<div class="hdr1">

			<div class="head">
			<?php if ( function_exists( 'jetpack_the_site_logo' ) ) jetpack_the_site_logo(); ?>
			<h1 class="site-title"><a href="<?php echo esc_url( home_url( '/' ) ); ?>"><?php bloginfo( 'name' ); ?></a></h1>
			<h4 class="site-description"><?php bloginfo( 'description' ); ?></h4>

			</div>

				<div class="sidebar-head3 span2">
					<?php dynamic_sidebar('sidebar-head'); ?>
				</div>

				<div class="sidebar-head4 span2">

					<?php if (class_exists('woocommerce')) :?>

							<?php global $woocommerce; ?>

My logo url is: https://www.dayanddawn.com/wp-content/uploads/2015/03/DayandDawn.png

Thank you .