diff --git a/README.md b/README.md
index 07f9492..3e1c9a2 100644
--- a/README.md
+++ b/README.md
@@ -132,7 +132,7 @@ LOOP    TAY
         BNE LOOP
 ```
 
-This is a small program which lets the accumulator grow quadratically while X decreases linearly:
+This is a small program which lets the accumulator register grow quadratically while X decreases linearly:
 
 ![A at PC 0x6012](doc/example03_1.gif?raw=true)
 ![X at PC 0x6015](doc/example03_2.gif?raw=true)
diff --git a/doc/screenshot.png b/doc/screenshot.png
index 36a5c0f..4742e5a 100644
Binary files a/doc/screenshot.png and b/doc/screenshot.png differ