diff --git a/README.md b/README.md
index 2db68db8..6d241c68 100644
--- a/README.md
+++ b/README.md
@@ -135,6 +135,13 @@ Here's an example program in Mu:
 
 <img alt='ex2.mu' src='html/ex2.mu.png' width='400px'>
 
+To reproduce it:
+
+```sh
+$ ./translate_mu_baremetal baremetal/ex2.mu  # emit disk.img
+$ qemu-system-i386 disk.img
+```
+
 [More details on Mu syntax &rarr;](mu.md)
 
 Here's an example program in SubX:
diff --git a/baremetal/ex2.mu b/baremetal/ex2.mu
index 091cb1d0..4e0f20ae 100644
--- a/baremetal/ex2.mu
+++ b/baremetal/ex2.mu
@@ -15,12 +15,12 @@ fn main {
   {
     compare y, 0x300  # 768
     break-if->=
-    var color/ecx: int <- copy y
-    color <- and 0xff
     var x/edx: int <- copy 0
     {
       compare x, 0x400  # 1024
       break-if->=
+      var color/ecx: int <- copy x
+      color <- and 0xff
       pixel 0, x, y, color
       x <- increment
       loop