diff --git a/examples/maze/heart_maze.scad b/examples/maze/heart_maze.scad
index a5ea2d2d..9ba074d4 100644
--- a/examples/maze/heart_maze.scad
+++ b/examples/maze/heart_maze.scad
@@ -3,6 +3,7 @@ use <hollow_out.scad>;
 use <ellipse_extrude.scad>;
 use <arc.scad>;
 use <experimental/mz_blocks.scad>;
+use <experimental/mz_get.scad>;
 
 radius_of_heart = 12;
 height_of_heart = 25;
@@ -58,20 +59,14 @@ module heart_to_heart_wall(radius, length, angle, thickness) {
 }
 
 module heart_maze(maze, radius, cblocks, levels, thickness = 1) {    
-    // NO_WALL = 0;       
-	// UPPER_WALL = 1;    
-	// RIGHT_WALL = 2;    
-	// UPPER_RIGHT_WALL = 3; 
+	function no_wall(block) = get_wall_type(block) == "NO_WALL";
+	function upper_wall(block) = get_wall_type(block) == "UPPER_WALL";
+	function right_wall(block) = get_wall_type(block) == "RIGHT_WALL";
+	function upper_right_wall(block) = get_wall_type(block) == "UPPER_RIGHT_WALL";
 
-	function no_wall(block) = get_wall_type(block) == 0;
-	function upper_wall(block) = get_wall_type(block) == 1;
-	function right_wall(block) = get_wall_type(block) == 2;
-	function upper_right_wall(block) = get_wall_type(block) == 3;
-
-	function block(x, y, wall_type, visited) = [x, y, wall_type, visited];
-	function get_x(block) = block[0];
-	function get_y(block) = block[1];
-	function get_wall_type(block) = block[2];
+	function get_x(block) = mz_get(block, "x"); 
+	function get_y(block) = mz_get(block, "y");
+	function get_wall_type(block) = mz_get(block, "w");
 	
     arc_angle = 360 / cblocks;
 	r = radius / (levels + 1);