diff --git a/esp32-clock-template.yaml b/esp32-clock-template.yaml
index e9209d0..24d6933 100644
--- a/esp32-clock-template.yaml
+++ b/esp32-clock-template.yaml
@@ -51,7 +51,7 @@ time:
 spi:
   clk_pin: GPIO18
   mosi_pin: GPIO19
-  
+
 sensor:
   - platform: uptime
     id: runtime
@@ -76,9 +76,17 @@ display:
 
       it.strftime(0, "%H%M%s", id(sntp_time).now());
       it.printf(7, "%2d", clock_frames);
+      it.printf(8, ".*-_'`,0");
       /*it.strftime(8, "%H%M%s", id(sntp_time).now());*/
       /*it.printf(11, "%1d", 0)*/
       it.printf(12, "%2d%2d%2d%2d", int(id(runtime).state/3600)%24, int(id(runtime).state/60)%60, int(id(runtime).state)%60, int(id(runtime).state-int(id(runtime).state)*25) );
-      
 
-    
+# the second display should display a test string to figure out the digit and segment map:
+# digit 0: >.< character (dot segment on)
+# digit 1: >*< character (upper segment on)
+# digit 2: >-< character (middle segment on)
+# digit 3: >_< character (lower segment on)
+# digit 4: >'< character (upper left segment on)
+# digit 5: >`< character (upper right segment on)
+# digit 6: >,< character (lower right segment on)
+# digit 7: >9< character (all on, except lower left segment)