The template include myContact plugin adapted for theme,
you need activate in config.php like this.
'plugins' => array( 'myContact', // active plugin. )
Go to myContact plugin/lib/send.php and change the email logo etc.
Go to myContact plugin/lib/ok.php and change the test success.
Go to myContact plugin/lib/error.php and change the test error.
The folder blocks contains html of sections.
Thank's to html5up
Images of unsplash