diff --git a/Part2/A4/.DS_Store b/Part2/A4/.DS_Store
index 88e3de3..3c99228 100644
Binary files a/Part2/A4/.DS_Store and b/Part2/A4/.DS_Store differ
diff --git a/Part2/A4/04_scroll/.DS_Store b/Part2/A4/04_scroll/.DS_Store
new file mode 100644
index 0000000..3fb9b9f
Binary files /dev/null and b/Part2/A4/04_scroll/.DS_Store differ
diff --git a/Part2/A4/04_scroll/kernel/kernel.c b/Part2/A4/04_scroll/kernel/kernel.c
index 1da8a16..aaa2bc7 100755
--- a/Part2/A4/04_scroll/kernel/kernel.c
+++ b/Part2/A4/04_scroll/kernel/kernel.c
@@ -6,10 +6,13 @@ void _start() {
 
     /* Fill up the screen */
     int i = 0;
-    for (i = 0; i < 24; i++) {
+    for (i = 0; i < 30; i++) {
         char str[255];
         int_to_ascii(i, str);
         kprint_at(str, 0, i);
+        for( int j = 0; j < 100000000; ++j) {
+            ;
+        }
     }
 
     kprint_at("This text forces the kernel to scroll. Row 0 will disappear. ", 60, 24);
diff --git a/Part2/A4/08_shell/.DS_Store b/Part2/A4/08_shell/.DS_Store
new file mode 100644
index 0000000..7012265
Binary files /dev/null and b/Part2/A4/08_shell/.DS_Store differ