diff --git a/sprito.py b/sprito.py
index 34c1d1a..baf96ff 100644
--- a/sprito.py
+++ b/sprito.py
@@ -58,6 +58,14 @@ def invert_rect(x: int, y: int, w: int, h: int) -> None:
     for j in range(y, y + h):
       invert_pixel(i, j)
 
+def wait_until_ac() -> int:
+  c = 0
+  try:
+    while 1:
+      c += 1
+  except:
+    return c
+
 #color constants
 C_BLACK = (0,0,0)
 C_WHITE = (255,255,255)