Make map dot pattern

public/assets/css/map.css

@@ -44,7 +44,7 @@ polyline.move-trace {
 }
 
 #background {
-  fill: #bacae3;
+  /* fill: #bacae3; */
 }
 
 #map2 {
@@ -400,8 +400,12 @@ g[data-y="76"] { --i: 76; }
   transform: scale(0.9);
 }
 
+#buildings {
+  /* display: none; */
+}
+
 .building, #terrain {
-  opacity: 1;
+  /* opacity: 0.5; */
 }
 
 .building .floor {