diff --git a/main.rkt b/main.rkt
index ae2c90a..4355c5d 100644
--- a/main.rkt
+++ b/main.rkt
@@ -21,8 +21,7 @@
 
 ; image representing the empty grid
 (define EMPTY-GRID
-  (let* [
-         [bitmap (make-bitmap (* GRID-WIDTH GRID-SCALE) (* GRID-HEIGHT GRID-SCALE))]
+  (let* [[bitmap (make-bitmap (* GRID-WIDTH GRID-SCALE) (* GRID-HEIGHT GRID-SCALE))]
          [dc (new bitmap-dc% [bitmap bitmap])]]
     (send dc set-brush "black" 'solid)
     (for ([x (in-range GRID-WIDTH)])
@@ -64,7 +63,7 @@
    (< (- GRID-WIDTH 1) (point-x p))
    (< (- GRID-WIDTH 1) (point-y p))))
 
-; Line Board -> Bool
+; Line Grid -> Bool
 ; returns #t if adding the given move to the grid is valid.
 (define (valid-move? line grid)
   (and
@@ -78,8 +77,7 @@
 ; Grid -> Image
 ; renders grid to an image for showing humans the game.
 (define (render-grid grid)
-  (let* [
-         [bitmap (make-bitmap (* GRID-WIDTH GRID-SCALE) (* GRID-HEIGHT GRID-SCALE))]
+  (let* [[bitmap (make-bitmap (* GRID-WIDTH GRID-SCALE) (* GRID-HEIGHT GRID-SCALE))]
          [dc (new bitmap-dc% [bitmap bitmap])]]
     (for ([l grid])
       (cond
@@ -89,7 +87,7 @@
             (+ 4 (* GRID-SCALE (point-x (line-from l))))
             (+ 4 (* GRID-SCALE (point-y (line-from l))))
             (+ 4 (* GRID-SCALE (point-x (line-to l))))
-            (+ 4 (* GRID-SCALE (point-y (line-to l))))))
+            (+ 4 (* GRID-SCALE (point-y (line-to l)))))) ; draw the line
       
     (send dc draw-bitmap EMPTY-GRID 0 0) ; overlay dot grid 
     bitmap))
\ No newline at end of file