diff --git a/samplesplash_vblank.s b/samplesplash_vblank.s
index f262971..6f1b58e 100644
--- a/samplesplash_vblank.s
+++ b/samplesplash_vblank.s
@@ -1,2 +1,10 @@
+
 vblank:
-    ret
\ No newline at end of file
+    pusha
+    add word [SS:0xFE00], 0x111
+    mov AL, byte [SS:0x7002]
+    out 0x15, AL
+    inc byte [SS:0x7001]
+    inc byte [SS:0x7002]
+    POPA
+    RETF
\ No newline at end of file