Add flicker

src/patterns.py

@@ -25,6 +25,7 @@ class Patterns:
             "random_theater_chase": self.random_theater_chase_step,
             "random_blink": self.random_blink_step,
             "color_transition": self.color_transition_step,
+            "flicker": self.flicker_step, # Added the new flicker pattern
             "external": None
         }
         self.selected = selected
@@ -150,8 +151,9 @@ class Patterns:
            return True
         return False
 
-    def apply_brightness(self, color):
+    def apply_brightness(self, color, brightness_override=None):
-        return tuple(int(c * self.brightness / 255) for c in color)
+        effective_brightness = brightness_override if brightness_override is not None else self.brightness
+        return tuple(int(c * effective_brightness / 255) for c in color)
 
     def select(self, pattern):
         if pattern in self.patterns:
@@ -364,3 +366,16 @@ class Patterns:
                 self.hold_start_time = current_time
 
             self.last_update = current_time
+
+    def flicker_step(self):
+        current_time = utime.ticks_ms()
+        if utime.ticks_diff(current_time, self.last_update) >= self.delay/5:
+            base_color = self.colors[0]
+            # Increase the range for flicker_brightness_offset
+            # Changed from self.brightness // 4 to self.brightness // 2 (or even self.brightness for max intensity)
+            flicker_brightness_offset = random.randint(-int(self.brightness // 1.5), int(self.brightness // 1.5))
+            flicker_brightness = max(0, min(255, self.brightness + flicker_brightness_offset))
+
+            flicker_color = self.apply_brightness(base_color, brightness_override=flicker_brightness)
+            self.fill(flicker_color)
+            self.last_update = current_time