Add low battery flashing, 99% full

polybar/index.nix

@@ -5,8 +5,7 @@ let
   background-alt = "#3b4252";
   foreground = "#eceff4";
   primary = "#8fbcbb";
-  secondary = "#ff00ff"; # not sure what this does
-  alert = "#ff00ff"; # not sure what this does
+  alert = "#bf616a";
   disabled = "#434c5e";
 in
 {
@@ -130,9 +129,16 @@ in
         battery = "BAT0";
         adapter = "AC";
 
+        format-low = "<animation-low> <label-low>";
+
         label-charging = "%{F${primary}}AC%{F-} %percentage%%";
-        label-discharging = "%{F${primary}}BAT%{F-} %percentage%%";
-        label-full = "%{F${primary}}AC%{F-}";
+        label-discharging = "%{F${primary}}BAT%{F-} %percentage%%";       label-full = "%{F${primary}}AC%{F-}";
+
+        animation-low-0 = "%{F${primary}}BAT%{F-}";
+        animation-low-1 = "%{F${alert}}LOW%{F-}";
+
+        full-at = 99;
+        low-at = 10; # default
       };
       "module/date" = {
         type = "internal/date";