Make the purple light turn on when we accept images

Drop some of the other colors to make it clearer

Change-Id: I498333523de222888b29d106f276d2f1570e35e6
Signed-off-by: Austin Schuh <austin.linux@gmail.com>
diff --git a/y2022/localizer/localizer_output.fbs b/y2022/localizer/localizer_output.fbs
index ec3302a..ff25c31 100644
--- a/y2022/localizer/localizer_output.fbs
+++ b/y2022/localizer/localizer_output.fbs
@@ -34,6 +34,9 @@
   // Whether each led should be on.
   // Indices correspond to pi number.
   led_outputs:[LedOutput] (id: 6);
+
+  // Cumulative number of accepted images.
+  image_accepted_count:uint (id: 7);
 }
 
 root_type LocalizerOutput;