diff --git a/effects.py b/effects.py
index fa3d9f9..ff43b88 100644
--- a/effects.py
+++ b/effects.py
@@ -17,7 +17,7 @@ def SolidColorTest(wall):
     print "SolidColorTest"
     wall.clear()
 
-    hue = 1
+    hue = 0
     saturation = 1
     value = 1
 
@@ -111,6 +111,20 @@ def Checkerboards(wall):
         wall.draw()
         time.sleep(0.5)
 
+def Checkerboards2(wall):
+    print "Checkerboards2"
+    wall.clear()
+
+    for i in range(10):
+        for x in range(wall.width):
+            for y in range(wall.height):
+                if (x + y + i) % 3 == 0:
+                    wall.set_pixel(x, y, colors["black"])
+                else:
+                    wall.set_pixel(x, y, colors["yellow"])
+        wall.draw()
+        time.sleep(0.5)
+
 def Columns(wall):
     print "Columns"
     wall.clear()
diff --git a/run.py b/run.py
index 1c91eda..ae5ed3e 100644
--- a/run.py
+++ b/run.py
@@ -37,6 +37,7 @@
         effects.DictionaryTest(wall)
         effects.RainbowTest(wall)
         effects.Checkerboards(wall)
+        #effects.Checkerboards(wall)
         effects.Columns(wall)
         effects.Rainbow(wall)
         effects.Twinkle(wall)