diff --git a/mr/ub10/A2/A2.m b/mr/ub10/A2/A2.m
index 857790f..93e9f62 100644
--- a/mr/ub10/A2/A2.m
+++ b/mr/ub10/A2/A2.m
@@ -102,7 +102,7 @@
     latex(sym(dv))
 end
 %plot gradient
-colormap(summer)
+colormap(gray)
 imagesc(d)
 
 %get gradient path.
diff --git a/mr/ub10/A2/gradientA.png b/mr/ub10/A2/gradientA.png
index 26eb5f3..830331a 100644
--- a/mr/ub10/A2/gradientA.png
+++ b/mr/ub10/A2/gradientA.png
Binary files differ
diff --git a/mr/ub10/A2/gradientB.png b/mr/ub10/A2/gradientB.png
index 1556b73..c809b19 100644
--- a/mr/ub10/A2/gradientB.png
+++ b/mr/ub10/A2/gradientB.png
Binary files differ