Catch a couple special cases

- Light the first pixel on timer start
- Wait to light the last pixel until timer has truly elapsed

colorbar-fastloop.py

@@ -111,9 +111,25 @@ def countdown(
 
             # Do update stuff
 
+            # Calculate the current position
+            current_position = round(num_pixels * ((seconds - current_time) / seconds))
+
+            # Catch a couple of special cases
+            if current_position == 0:
+                # Light the first LED when the timer starts
+                #  regardless of other factors
+                colorizer(0, colormode)
+            elif current_position == num_pixels and current_time > 0:
+                # If current_position calls for *all*
+                #  pixels to be lit, and the timer
+                #  hasn't expired yet, don't do anything.
+                #  This should delay the last pixel from
+                #  lighting until the timer has fully elapsed
+                pass
+            else:
                 # Loop over every pixel ID that should be lit
                 #   based on the elapsed time
-            for pixel in range(round(num_pixels * ((seconds - current_time) / seconds))):
+                for pixel in range(current_position):
                     # Set pixel color stuff
                     if current_time < 0:
                         pass