Update background patterns

res/static/img/background_patterns/create_transparent.sh

@@ -4,12 +4,11 @@ transparent () {
 	convert $1.png -alpha set -channel a -evaluate set $2 $1_transparent.png
 }
 
-for i in {0..18}; do transparent "checker${i}" 5%; done
+for i in {0..20}; do transparent "checker${i}" 6%; done
 transparent "checker_wednesday" 8%
 transparent "checker_dwarf" 8%
 transparent "checker_developers" 8%
 transparent "checker_halloween" 8%
 transparent "checker_christmas" 8%
-transparent "checker_ukraine" 8%
 
 optipng *.png

webcontroller/style.go

@@ -300,7 +300,7 @@ func BackgroundTiles() template.URL {
 	} else if month == time.December && (day == 25 || day == 26 || day == 27) {
 		file = "checker_christmas"
 	} else {
-		file = fmt.Sprintf("checker%d", now.UnixNano()%19)
+		file = fmt.Sprintf("checker%d", now.UnixNano()%20)
 	}
 
 	return template.URL("/res/img/background_patterns/" + file + "_transparent.png")