Game - Create Grid Iteration Function

lib/game/Game.dart

@@ -1,5 +1,7 @@
 import 'dart:html';
 
+typedef void gridIterator(int x, int y);
+
 class Game {
   List<List<Color>> grid;
   CanvasElement canvas;
@@ -19,28 +21,29 @@ class Game {
     int brickW = (canvas.width ~/ grid[0].length);
     int brickH = (canvas.height ~/ grid.length);
 
-    ctx.setFillColorRgb(255, 0,0);
     ctx.clearRect(0, 0, canvas.width, canvas.height);
-    for(int y=0;y<grid.length;y++) {
-      for(int x=0;x<grid[y].length;x++) {
+    grid_foreach((x, y) {
         Color col = grid[y][x];
-        ctx.setFillColorRgb(col.r, col.g, col.b);
+        ctx.setFillColorRgb(col.r+_oscill, col.g+_oscill, col.b+_oscill);
         ctx.fillRect(x*brickW, y*brickH, brickW, brickH);
+    });
+  }
+
+  Color _oscillate(Color) {}
+
+  void grid_foreach(gridIterator fun) {
+    for (int y = 0; y < grid.length; y++) {
+      for (int x = 0; x < grid[y].length; x++) {
+        fun(x, y);
       }
     }
   }
 
-  Color _oscillate(Color) {
-
-  }
-
   List<List<Color>> buildGrid(int w, int h, Color col) {
     List<List<Color>> grid = new List(h);
-
-
-    for(int y = 0; y< h; y++) {
+    for (int y = 0; y < h; y++) {
       grid[y] = new List(w);
-      for(int x = 0; x< w; x++) {
+      for (int x = 0; x < w; x++) {
         grid[y][x] = col;
       }
     }
@@ -54,10 +57,9 @@ class Color {
   final int b;
 
   const Color(this.r, this.g, this.b);
-
 }
 
 // Create 2d array
 // fill with random colors
 // cycle colors
-// set one color to random new one
+// set one color to random new one