diff --git a/static/img/banner.jpg b/static/img/banner_closed.jpg
similarity index 100%
rename from static/img/banner.jpg
rename to static/img/banner_closed.jpg
diff --git a/static/img/banner_unknown.jpg b/static/img/banner_unknown.jpg
new file mode 100644
index 0000000..1eda673
Binary files /dev/null and b/static/img/banner_unknown.jpg differ
diff --git a/themes/hugo-theme-flat/static/css/style.css b/themes/hugo-theme-flat/static/css/style.css
index 573c681..a65b9ba 100644
--- a/themes/hugo-theme-flat/static/css/style.css
+++ b/themes/hugo-theme-flat/static/css/style.css
@@ -252,7 +252,7 @@ a.external:after {
 /* .header-wrapper, .footer { width: 100vw; } */
 .header {
   /*background-image: url("/img/banner.png");*/
-  background-image: url("/img/banner.jpg");
+  background-image: url("/img/banner_unknown.jpg");
   background-size: cover;
   background-repeat: no-repeat;
   background-position-x: center ;
@@ -261,6 +261,9 @@ a.external:after {
 .door_open .header{
     background-image: url("/img/banner_open.jpg");
 }
+.door_closed .header{
+  background-image: url("/img/banner_closed.jpg");
+}
 .header-wrapper,
 .footer {
   width: 90vw;