diff --git a/main.js b/main.js
index 46221d4..5b100eb 100644
--- a/main.js
+++ b/main.js
@@ -16,160 +16,7 @@ canvas.height = BLOCK_SIZE * BOARD_HEIGHT
 context.scale(BLOCK_SIZE, BLOCK_SIZE)
 
 // 3. board
-// const board = createBoard(BOARD_WIDTH, BOARD_HEIGHT)
-
-const board = [
-  [
-    0, 0, 0, 0, 0, 0,
-    0, 0, 0, 0, 0, 0,
-    0, 0
-  ],
-  [
-    0, 0, 0, 0, 0, 0,
-    0, 0, 0, 0, 0, 0,
-    0, 0
-  ],
-  [
-    0, 0, 0, 0, 0, 0,
-    0, 0, 0, 0, 0, 0,
-    0, 0
-  ],
-  [
-    0, 0, 0, 0, 0, 0,
-    0, 0, 0, 0, 0, 0,
-    0, 0
-  ],
-  [
-    0, 0, 0, 0, 0, 0,
-    0, 0, 0, 0, 0, 0,
-    0, 0
-  ],
-  [
-    0, 0, 0, 0, 0, 0,
-    0, 0, 0, 0, 0, 0,
-    0, 0
-  ],
-  [
-    0, 0, 0, 0, 0, 0,
-    0, 0, 0, 0, 0, 0,
-    0, 0
-  ],
-  [
-    0, 0, 0, 0, 0, 0,
-    0, 0, 0, 0, 0, 0,
-    0, 0
-  ],
-  [
-    0, 0, 0, 0, 0, 0,
-    0, 0, 0, 0, 0, 0,
-    0, 0
-  ],
-  [
-    0, 0, 0, 0, 0, 0,
-    0, 0, 0, 0, 0, 0,
-    0, 0
-  ],
-  [
-    0, 0, 0, 0, 0, 0,
-    0, 0, 0, 0, 0, 0,
-    0, 0
-  ],
-  [
-    0, 0, 0, 0, 0, 0,
-    0, 0, 0, 0, 0, 0,
-    0, 0
-  ],
-  [
-    0, 0, 0, 0, 0, 0,
-    0, 0, 0, 0, 0, 0,
-    0, 0
-  ],
-  [
-    0, 0, 0, 0, 0, 0,
-    0, 0, 0, 0, 0, 0,
-    0, 0
-  ],
-  [
-    0, 0, 0, 0, 0, 0,
-    0, 0, 0, 0, 0, 0,
-    0, 0
-  ],
-  [
-    0, 0, 0, 0, 0, 0,
-    0, 0, 0, 0, 0, 0,
-    0, 0
-  ],
-  [
-    0, 0, 0, 0, 0, 0,
-    0, 0, 0, 0, 0, 0,
-    0, 0
-  ],
-  [
-    0, 0, 0, 0, 0, 0,
-    0, 0, 0, 0, 0, 0,
-    0, 0
-  ],
-  [
-    0, 0, 0, 0, 0, 0,
-    0, 0, 0, 0, 0, 0,
-    0, 0
-  ],
-  [
-    0, 0, 0, 0, 0, 0,
-    0, 0, 0, 0, 0, 0,
-    0, 0
-  ],
-  [
-    0, 0, 0, 0, 0, 0,
-    0, 0, 0, 0, 0, 0,
-    0, 0
-  ],
-  [
-    0, 0, 0, 0, 0, 0,
-    0, 0, 0, 0, 0, 0,
-    0, 0
-  ],
-  [
-    0, 0, 0, 0, 0, 0,
-    0, 0, 0, 0, 0, 0,
-    0, 0
-  ],
-  [
-    0, 0, 0, 0, 0, 0,
-    0, 0, 0, 0, 0, 0,
-    0, 0
-  ],
-  [
-    0, 0, 0, 0, 0, 0,
-    0, 0, 0, 0, 0, 0,
-    0, 0
-  ],
-  [
-    0, 0, 0, 0, 0, 0,
-    0, 0, 0, 0, 0, 0,
-    0, 0
-  ],
-  [
-    0, 0, 0, 0, 0, 0,
-    0, 0, 0, 0, 0, 0,
-    0, 0
-  ],
-  [
-    0, 0, 0, 0, 0, 0,
-    0, 0, 0, 0, 0, 0,
-    0, 0
-  ],
-  [
-    1, 1, 1, 1, 1, 1,
-    1, 1, 1, 1, 1, 1,
-    0, 0
-  ],
-  [
-    1, 1, 1, 1, 1, 1,
-    1, 1, 1, 1, 1, 1,
-    0, 0
-  ]
-]
+const board = createBoard(BOARD_WIDTH, BOARD_HEIGHT)
 
 function createBoard (width, height) {
   return Array(height).fill().map(() => Array(width).fill(0))