<div class="illustration col-md-6">
<center>
<img src="img/Illustration.png" alt="large-illutration" class="img-responsive center-dblock" /><hr />
<div class="illustration col-md-6">
<center>
<img src="img/Illustration.png" alt="large-illutration" class="img-responsive center-dblock" /><hr />