diff --git a/test_tool/thewall.s b/test_tool/thewall.s
new file mode 100644
index 0000000..8a92454
--- /dev/null
+++ b/test_tool/thewall.s
@@ -0,0 +1,16 @@
+.name		"TheWall"
+.comment	"You will pray for mercy"
+
+	ld %1, r2
+	ld %2, r3
+	ld %42, r4
+	ld %0, r16
+fork:	fork %-42
+	st r16, :fork
+s1:	sti r2, r3, %64
+s2:	sti r1, r3, %62
+	add r3, r4, r3
+	sti r1, %:live, %1
+	ld %0, r16
+live:	live %42
+	zjmp %:s1