diff --git a/Gemfile.lock b/Gemfile.lock
index 25ccb52..01eed4e 100755
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -54,7 +54,7 @@ GEM
       jekyll (>= 3.0, < 5.0)
     jekyll-sass-converter (2.1.0)
       sassc (> 2.0.1, < 3.0)
-    jekyll-theme-centos (0.8.9)
+    jekyll-theme-centos (0.8.10)
       jekyll (~> 4.0)
     jekyll-tidy (0.2.2)
       htmlbeautifier
@@ -65,7 +65,7 @@ GEM
       nokogiri (~> 1.11)
     jekyll-watch (2.2.1)
       listen (~> 3.0)
-    json (2.5.1)
+    json (2.6.0)
     kramdown (2.3.1)
       rexml
     kramdown-parser-gfm (1.1.0)
@@ -83,7 +83,7 @@ GEM
       forwardable-extended (~> 2.6)
     progressbar (1.11.0)
     public_suffix (4.0.6)
-    racc (1.5.2)
+    racc (1.6.0)
     rb-fsevent (0.11.0)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
@@ -97,7 +97,7 @@ GEM
     thread_safe (0.3.6)
     tzinfo (1.2.9)
       thread_safe (~> 0.1)
-    tzinfo-data (1.2021.3)
+    tzinfo-data (1.2021.4)
       tzinfo (>= 1.0.0)
     unicode-display_width (1.8.0)
     verbal_expressions (0.1.5)
diff --git a/assets/img/motif.png b/assets/img/motif.png
new file mode 100644
index 0000000..5fe5459
Binary files /dev/null and b/assets/img/motif.png differ