diff --git a/examples/flash.py b/examples/flash.py
index 71a161c..91b8d62 100644
--- a/examples/flash.py
+++ b/examples/flash.py
@@ -5,8 +5,8 @@ num_leds = 30
 pixels = ws2812b(num_leds, 0,0)
 
 while True:
-    for i in range(30):
-        for j in range(30):
+    for i in range(num_leds):
+        for j in range(num_leds):
             pixels.set_pixel(j,abs(i+j)%10,abs(i-(j+3))%10,abs(i-(j+6))%10)          
         pixels.show()
         time.sleep(0.05)