How to change blog page featured image with a static image?

Default featured image of the blog page is your latest post featured image. If you want to add a static image instead of latest post image;

Openup Appearance->Editor->index.php . Find the following code (at the bottom of the page);

<?php if ( has_post_thumbnail() ) { echo '<script type="text/javascript">jQuery("body").find("#left").backstretch("' . $post_thumbnail_url . '"); </script>'; } ?>

change it with the following code;

<script type="text/javascript">jQuery("body").find("#left").backstretch("YOURIMAGELINK"); </script>

Don’t forget to add your image link…