diff --git a/wallpaper/script.sh b/wallpaper/script.sh
index aca9d65..114bef5 100755
--- a/wallpaper/script.sh
+++ b/wallpaper/script.sh
@@ -2,6 +2,8 @@
 PATHNAME=~/wallpaper/
 cd $PATHNAME
 date=`date +"%H"`
+#alway interprete data as decimal number
+date="10#$date"
 
 FOUND=-24