diff --git a/tile.py b/tile.py
index 697cf8e..702182f 100644
--- a/tile.py
+++ b/tile.py
@@ -1,27 +1,55 @@
 from turtle import *
+import math
 
 def draw_tile(size):
     "Draws one tile, which can be repeated to form a pattern."
     draw_tile_outline(size)
-    draw_squiggle(size)
+    draw_cross(size)
+    draw_triangle(size)
+    draw_circle(size)
 
 def draw_tile_outline(size):
     pencolor("#dddddd")
     square(size)
 
-def draw_squiggle(size):
-    forward(size/4)
-    pencolor("black")
-    left(90)
-    quarter_arc_right(size/4)
-    quarter_arc_left(size/4)
-    quarter_arc_left(size/4)
-    quarter_arc_right(size/4)
+def draw_cross(size):
+    pencolor("blue")
+    fly(size/2)
     left(90)
     fly(size/4)
+    right(90)
+    cross(size/4)
+    right(90)
+    fly(size/4)
+    right(90)
+    fly(size/2)
+    right(180)
+
+def draw_triangle(size):
+    pencolor("red")
+    fly(size/8)
     left(90)
-    fly(size)
+    fly(size/8)
+    right(90)
+    triangle(size/4)
+    right(90)
+    fly(size/8)
+    right(90)
+    fly(size/8)
+    right(180)
+
+def draw_circle(size):
+    pencolor("gold")
+    fly(size/2.5)
     left(90)
+    fly(size/1.5)
+    right(90)
+    circle(size/8)
+    right(90)
+    fly(size/1.5)
+    right(90)
+    fly(size/2.5)
+    right(180)
 
 def fly(distance):
     "Moves without drawing."
@@ -35,10 +63,19 @@ def square(size):
         forward(size)
         left(90)
 
-def quarter_arc_right(radius):
-    "Draws a quarter of an arc, turning to the right."
-    circle(-radius, 90)
+def triangle(size):
+    "Draws a triangle with side length `size`"
+    for side in range(3):
+        forward(size)
+        left(120)
 
-def quarter_arc_left(radius):
-    "Draws a quarter of an arc, turning to the left."
-    circle(radius, 90)
+def cross(size):
+     "Draws a cross in invisible square with side length `size`"
+     left(45)
+     forward(size*math.sqrt(2))
+     right(45)
+     fly(-size)
+     right(45)
+     forward(size*math.sqrt(2))
+     left(45)
+     fly(-size)
diff --git a/tile_grid.py b/tile_grid.py
index 72a0f43..e87f55a 100644
--- a/tile_grid.py
+++ b/tile_grid.py
@@ -10,7 +10,7 @@ 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.)
+    I actually don't get it... explain it to me, pls! Cause how does it link to the tile file?? Confusing...
     """
     for y in range(height):
         for x in range(width):