diff --git a/001.simple_image/Makefile b/001.simple_image/Makefile
index c2e5233..b31efd3 100644
--- a/001.simple_image/Makefile
+++ b/001.simple_image/Makefile
@@ -1,6 +1,6 @@
 FLOPPY=bin/image.adf
 EXTRA=out/image-copper-list.s out/image.bin
-IMAGEFILE=../assets/mission-beach.png
+IMAGEFILE=../assets/quake.png
 
 MODULE=image.s
 
diff --git a/001.simple_image/README.md b/001.simple_image/README.md
index 59dc848..2263ac5 100644
--- a/001.simple_image/README.md
+++ b/001.simple_image/README.md
@@ -14,6 +14,11 @@ screenshot
 
 ![Screenshot](screenshot.png?raw=true)
 
+original image
+--------------
+
+![Original](../assets/quake.png?raw=true)
+
 try it
 ------
   * [Download disk image](bin/image.adf?raw=true)
diff --git a/001.simple_image/screenshot.png b/001.simple_image/screenshot.png
index 21adf89..359dbad 100644
Binary files a/001.simple_image/screenshot.png and b/001.simple_image/screenshot.png differ
diff --git a/assets/quake.png b/assets/quake.png
new file mode 100644
index 0000000..038c1bf
Binary files /dev/null and b/assets/quake.png differ