Did some arithmetic to have the clock segments consistent

.gitignore

@@ -1 +1,4 @@
-.vscode
+debug.cfg
+debug_custom.json
+esp32.svd
+.vscode/

README.md

@@ -49,6 +49,21 @@ A happy setup will cycle through each color once,
 and then display orange for a while.
 
 
+Clock
+-----
+
+At night, 
+and sometimes during the day,
+it displays something like a clock.
+You will need to tell it your time zone.
+It doesn't do daylight saving time, sorry.
+I suggest you set it to standard time and pretend it's in sync with the sun.
+
+* Each pixel in the top row is 1 hour (3600 seconds)
+* Each pixel in the middle row is 5 minutes (300 seconds)
+* Each pixel in the bottom row is 25 seconds
+* There are four pixels around the bottom that move every 5 seconds
+
 Philosophy
 ----------
 

wallart.ino

@@ -250,15 +250,28 @@ void displayTime(unsigned long duration = 20 * SECOND) {
   while (millis() < end) {
     timeClient.update();
     int hh = timeClient.getHours();
-    int mm = timeClient.getMinutes();
+    int mmss = timeClient.getMinutes()*60 + timeClient.getSeconds();
-    int ss = timeClient.getSeconds();
     uint8_t hue = HUE_YELLOW;
 
+    // Top: Hours
     if (hh >= 12) {
       hue = HUE_ORANGE;
       hh -= 12;
     }
 
+    // Middle: 5m (300s)
+    uint8_t mm = (mmss/300) % 12;
+
+    // Bottom: 25s
+    uint8_t ss = (mmss/25) % 12;
+
+    // Outer: 5s
+    uint8_t s = (mmss/5) % 5;
+    grid[64 -  7 - 1] = CHSV(HUE_PURPLE, 64, (s==1)?64:0);
+    grid[64 - 15 - 1] = CHSV(HUE_PURPLE, 64, (s==2)?64:0);
+    grid[64 -  8 - 1] = CHSV(HUE_PURPLE, 64, (s==3)?64:0);
+    grid[64 -  0 - 1] = CHSV(HUE_PURPLE, 64, (s==4)?64:0);
+
     for (int i = 0; i < 12; i++) {
       // Omit first and last position on a row
       int pos = i + 1;
@@ -267,8 +280,8 @@ void displayTime(unsigned long duration = 20 * SECOND) {
       }
 
       grid[pos + 0] = CHSV(hue, 255, (i<hh)?128:48);
-      grid[pos + 24] = CHSV(HUE_RED, 255, (i<mm/5)?128:48);
+      grid[pos + 24] = CHSV(HUE_RED, 255, (i<mm)?128:48);
-      grid[pos + 48] = CHSV(HUE_PINK, 128, (i<ss/5)?96:48);
+      grid[pos + 48] = CHSV(HUE_PINK, 128, (i<ss)?96:48);
     }
     FastLED.show();
 
@@ -298,11 +311,15 @@ void loop() {
   }
   FastLED.setBrightness(day?DAY_BRIGHTNESS:NIGHT_BRIGHTNESS);
 
+  // If we don't yet have net art, try a little harder to get it.
   if ((NetArtFrames == 0) || !conn) {
     getprob = 16;
   }
-  
+
-  if (p.Pick(getprob)) {
+  if (!day || p.Pick(4)) {
+    // At night, only ever show the clock
+    displayTime(2 * MINUTE);
+  } else if (p.Pick(getprob)) {
     netget();
   } else if (day && p.Pick(4)) {
     // These can be hella bright
@@ -324,7 +341,5 @@ void loop() {
     cm5(8);
   } else if (p.Pick(2)) { 
     cm5(16);
-	} else if (p.Pick(4)) {
+	}
-    displayTime(1 * MINUTE);
-  }
 }