Color cameras by pi number

Change-Id: I73dfb5135da2de21177ca62eb3223ae36d89c519
Signed-off-by: James Kuszmaul <jabukuszmaul@gmail.com>
diff --git a/y2020/www/field.html b/y2020/www/field.html
index 5b486ea..15068f0 100644
--- a/y2020/www/field.html
+++ b/y2020/www/field.html
@@ -5,6 +5,7 @@
   </head>
   <body>
     <div id="field"> </div>
+    <div id="legend"> </div>
     <div id="readouts">
       <div>
         <div> X </div>