diff --git a/day14/sol.py b/day14/sol.py
index aff40a0..ae2d482 100644
--- a/day14/sol.py
+++ b/day14/sol.py
@@ -65,11 +65,15 @@ def show():
 
 show()
 
-def drip(p, floor=None):
+def drip(p, floor=None, lastpath=[]):
     x,y=p
+    if p in lastpath:
+        x,y = lastpath.pop()
     while True:
+        lastpath.append((x,y))
         if y+1 == floor:
             # blocked
+            lastpath.pop()
             put(x,y,'o')
             return 'done'
         if y >= Y1:
@@ -89,6 +93,7 @@ def drip(p, floor=None):
             x,y = x+1, y+1
             continue
         # blocked!
+        lastpath.pop()
         put(x,y,'o')
         #print(x,y)
         return 'done'