diff --git a/test/2024,9,23/homework.py b/test/2024,9,23/homework.py
index 125b090..ebfb9b0 100644
--- a/test/2024,9,23/homework.py
+++ b/test/2024,9,23/homework.py
@@ -14,28 +14,19 @@ def draw_circle(event, x, y, flags, param):
 
 # 4
 alpha = 0.3
-beta = 80
 
 
-def updateAlpha(x):
+def updateBrightness(x):
     global alpha, img, img2
-    alpha = cv.getTrackbarPos('Alpha', 'modify_sample')
+    alpha = cv.getTrackbarPos('Brightness', 'modify_sample')
     alpha = alpha * 0.01
-    img = np.uint8(np.clip((alpha * img2 + beta), 0, 255))
-
-
-def updateBeta(x):
-    global beta, img, img2
-    beta = cv.getTrackbarPos('Beta', 'modify_sample')
-    img = np.uint8(np.clip((alpha * img2 + beta), 0, 255))
+    img = np.uint8(np.clip((alpha * img2), 0, 255))
 
 
 # 3
 cv.namedWindow('modify_sample')
-cv.createTrackbar('Alpha', 'modify_sample', 0, 300, updateAlpha)
-cv.createTrackbar('Beta', 'modify_sample', 0, 255, updateBeta)
-cv.setTrackbarPos('Alpha', 'modify_sample', 100)
-cv.setTrackbarPos('Beta', 'modify_sample', 10)
+cv.createTrackbar('Brightness', 'modify_sample', 0, 255, updateBrightness)
+cv.setTrackbarPos('Brightness', 'modify_sample', 100)
 cv.setMouseCallback('modify_sample', draw_circle)
 while (1):
     cv.imshow('modify_sample', img)