Adding rendering code for escape, literal, and "."

src/index.html

@@ -40,14 +40,26 @@
           stroke: #000;
         }
 
-        .anchor text {
+        .anchor text, .any-character text {
           fill: #fff;
         }
 
-        .anchor rect {
+        .anchor rect, .any-character rect {
           fill: #6b6659;
         }
 
+        .escape text, .literal text {
+          fill: #000;
+        }
+
+        .escape rect {
+          fill: #bada55;
+        }
+
+        .literal rect {
+          fill: #dae9e5;
+        }
+
         .placeholder text {
           fill: #fff;
           font-weight: bold;