open Level_1;
open Level_3;

(* =========================================================== *)
(* some extra shapes and colors                                *)

fun put2D_1x1_BROWN      (x,z) = put2D (1,1) BROWN      (x,z);
fun put2D_2x2_LIGHTBROWN (x,z) = put2D (2,2) LIGHTBROWN (x,z);
fun put2D_3x6_DARKBROWN  (x,z) = put2D (3,6) DARKBROWN  (x,z);


(* =========================================================== *)
(* Program below here in Level 1 as usual.                     *)
(* You may call any of the three functions defined above.      *)

build2D (50,50);	

put2D_2x2_BLUE(0,0);       (* standard Level 1 function call    *) 
put2D_1x1_BROWN(2,0);      (* calling a function declared above *)
put2D_3x6_DARKBROWN(2,2);  (* calling a function declared above *)

show2D "adding functions";