diff --git a/examples/stereographic_hex_maze.scad b/examples/stereographic_hex_maze.scad
index c15e4679..4deb38fe 100644
--- a/examples/stereographic_hex_maze.scad
+++ b/examples/stereographic_hex_maze.scad
@@ -12,7 +12,14 @@ wall_height = 1;
 
 // build a hex maze
 module build_hex_maze(y_cells, x_cells, maze_vector, cell_radius, wall_thickness) {
-	module hex_seg(begin, end) {
+	function cell_position(x_cell, y_cell) =
+		let(
+			grid_h = 2 * cell_radius * sin(60),
+			grid_w = cell_radius + cell_radius * cos(60)
+		)
+		[grid_w * x_cell, grid_h * y_cell + (x_cell % 2 == 0 ? 0 : grid_h / 2), 0];
+
+    module hex_seg(begin, end) {
 		polyline2d(
 			[for(a = [begin:60:end]) 
 				[cell_radius * cos(a), cell_radius * sin(a)]], 
@@ -28,66 +35,64 @@ module build_hex_maze(y_cells, x_cells, maze_vector, cell_radius, wall_thickness
 	module down_wall() { hex_seg(240, 300); }
 	module down_right_wall() { hex_seg(300, 360); }	
 
-    function cell_position(x_cell, y_cell) =
-	     let(
-			grid_h = 2 * cell_radius * sin(60),
-    		grid_w = cell_radius + cell_radius * cos(60)
-		 )
-		 [grid_w * x_cell, grid_h * y_cell + (x_cell % 2 == 0 ? 0 : grid_h / 2), 0];
-
-	module build_cell_right_wall(x_cell) {
-		up_right_wall();
-		if(x_cell % 2 != 0) {
-			down_right_wall();
-		}
-	}
-
-	module build_cell_row_wall(x_cell) {
-		if(x_cell % 2 != 0) {
+	module build_cell(x, y, wall_type) {
+		module build_right_wall(x_cell) {
 			up_right_wall();
-		}
-		else {
-			down_right_wall();
-		}
-	}
-
-	module build_cell_border_if_necessary(x_cell, y_cell) {
-		if(x_cell == 0) {
-			up_left_wall();
-			down_left_wall();
-		}
-
-		if(y_cell == 0) {
-			down_wall();
-			if(x_cell % 2 == 0) {
-				down_left_wall();
+			if(x_cell % 2 != 0) {
 				down_right_wall();
 			}
-		} 
-		else if(y_cell == y_cells - 1 && x_cell % 2 != 0) {
-			up_left_wall();
 		}
+
+		module build_row_wall(x_cell, y_cell) {
+			if(x_cell % 2 != 0) {
+				up_right_wall();
+				if(y_cell == y_cells - 1) {
+					up_left_wall();
+				}
+			}
+			else {
+				down_right_wall();
+			}
+		}
+
+		build_row_wall(x, y); 
+
+		if(wall_type == UPPER_WALL || wall_type == UPPER_RIGHT_WALL) {
+			upper_wall();
+		}
+		if(wall_type == RIGHT_WALL || wall_type == UPPER_RIGHT_WALL) {
+			build_right_wall(x);
+		}  
 	}
 	
 	// create the wall of maze
-	for(i = [0:len(maze_vector) - 1]) {
-		cord = maze_vector[i];
-		x = cord[0] - 1;
-		y = cord[1] - 1;
-		wall_type = cord[2];
-
+	for(cell = maze_vector) {
+		x = cell[0] - 1;
+		y = cell[1] - 1;
+		wall_type = cell[2];
         translate(cell_position(x, y)) {
-			if(wall_type == UPPER_WALL || wall_type == UPPER_RIGHT_WALL) {
-				upper_wall();
-			}
-			if(wall_type == RIGHT_WALL || wall_type == UPPER_RIGHT_WALL) {
-				build_cell_right_wall(x);
-			}  
-			
-			build_cell_row_wall(x); 
-			build_cell_border_if_necessary(x, y);
+			build_cell(x, y, wall_type);
 		}
 	}  
+
+    // build left border
+    for(y = [0:y_cells - 1]) {
+        translate(cell_position(0, y)) {
+		    up_left_wall();
+		    down_left_wall();
+		}
+	}
+
+    // build bottom border
+    for(x = [0:x_cells - 1]) {
+        translate(cell_position(x, 0)) {
+			down_wall();
+			if(x % 2 == 0) {
+				down_left_wall();
+				down_right_wall();
+			}
+		}
+	}	
 }
 
 module hex_maze_stereographic_projection(x_cells, cell_radius, wall_thickness, fn, wall_height, shadow) {