add color_fader

effects/effect.py

@@ -2,6 +2,18 @@ import pygame as pg
 from abc import abstractmethod
 
 
+def color_fader(hue=0, increase=1):
+    color = pg.Color(255, 0, 0)
+    h, s, l, a = color.hsla
+    color.hsla = hue, s, l, a
+
+    while True:
+        yield color
+        h, s, l, a = color.hsla
+        h = (h + increase) % 360
+        color.hsla = h, s, l, a
+
+
 class Effect(pg.sprite.Sprite):
     def __init__(
         self, image: pg.Surface, rect: pg.Rect, *groups: pg.sprite.Group