Add patterns package.

Co-authored-by: Cursor <cursoragent@cursor.com>

src/patterns/blink.py

@@ -0,0 +1,33 @@
+import utime
+
+
+class Blink:
+    def __init__(self, driver):
+        self.driver = driver
+
+    def run(self, preset):
+        """Blink pattern: toggles LEDs on/off using preset delay, cycling through colors."""
+        # Use provided colors, or default to white if none
+        colors = preset.c if preset.c else [(255, 255, 255)]
+        color_index = 0
+        state = True  # True = on, False = off
+        last_update = utime.ticks_ms()
+
+        while True:
+            current_time = utime.ticks_ms()
+            # Re-read delay each loop so live updates to preset.d take effect
+            delay_ms = max(1, int(preset.d))
+            if utime.ticks_diff(current_time, last_update) >= delay_ms:
+                if state:
+                    base_color = colors[color_index % len(colors)]
+                    color = self.driver.apply_brightness(base_color, preset.b)
+                    self.driver.fill(color)
+                    # Advance to next color for the next "on" phase
+                    color_index += 1
+                else:
+                    # "Off" phase: turn all LEDs off
+                    self.driver.fill((0, 0, 0))
+                state = not state
+                last_update = current_time
+            # Yield once per tick so other logic can run
+            yield