Initial commit

tile_grid.py

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+# tile_grid.py
+# ------------
+# By MWC Contributors
+#
+# Implements `draw_tile_grid`, which draws a grid of tiles. 
+
+from turtle import *
+from tile import fly
+
+def draw_tile_grid(width, height, tile_size, tile_function):
+    """Draws a (width x height) grid, with tile_function drawn on each tile.
+
+    (Your explanation here.)
+    """
+    for y in range(height):
+        for x in range(width):
+            tile_function(tile_size)
+            fly(tile_size)
+        return_to_x_origin(tile_size, width)
+        move_up_one_row(tile_size)
+    return_to_y_origin(tile_size, height)
+
+def return_to_x_origin(tile_size, width):
+    "After drawing a row of tiles, returns the turtle to the starting x position"
+    fly(-1 * tile_size * width)
+
+def return_to_y_origin(tile_size, height):
+    "After drawing all rows of tiles, returns the turtle to the starting y position"
+    right(90)
+    fly(tile_size * height)
+    left(90)
+
+def move_up_one_row(tile_size):
+    "Moves the turtle up one row"
+    left(90)
+    fly(tile_size)
+    right(90)
+
+
+
+
+