Hi there, as the theme doesn’t come with patterns applied to the header area directly, you’d need to add these using custom css.

#top {
    background: url (your url for the pattern);

To center your logo – if the image hasn’t already been centered in a photo editing software – you will need to adjust the margins around the image using css, adjusting the pixel amounts to fit the positioning you require.

#logo {
    margin: 22px 0px 0px;

Please be advised though that we’re unable to help extensively with customised design. However, if you’re not used to dealing with css or making custom adjustments, and are on a tight deadline then there is a customised design service you can sign up to here – https://support.redfactory.nl/request-customization/ which may be able to assist further.