diff --git a/src/aphorisms/fourty_one.clj b/src/aphorisms/fourty_one.clj
index 4dc910c..defac0e 100644
--- a/src/aphorisms/fourty_one.clj
+++ b/src/aphorisms/fourty_one.clj
@@ -30,8 +30,8 @@
 (defn as-grid [rect cell-size]
   (let [n-x (int (/ (g/width rect) cell-size))
         n-y (int (/ (g/height rect) cell-size))
-        t (v/vec2 (* (mod (g/width rect) n-x) 0.5)
-                  (* (mod (g/height rect) n-x) 0.5))]
+        t (v/vec2 (* (mod (g/width rect) (* cell-size n-x)) 0.5)
+                  (* (mod (g/height rect) (* cell-size n-x)) 0.5))]
     (for [x (range n-x)
           y (range n-y)]
       (-> (r/rect (* x cell-size) (* y cell-size) cell-size)