diff --git a/worldeditadditions/lib/spiral_square.lua b/worldeditadditions/lib/spiral_square.lua
new file mode 100644
index 0000000..aa0b2fa
--- /dev/null
+++ b/worldeditadditions/lib/spiral_square.lua
@@ -0,0 +1,83 @@
+local wea = worldeditadditions
+local Vector3 = wea.Vector3
+
+-- ███████ ██████  ██ ██████   █████  ██
+-- ██      ██   ██ ██ ██   ██ ██   ██ ██
+-- ███████ ██████  ██ ██████  ███████ ██
+--      ██ ██      ██ ██   ██ ██   ██ ██
+-- ███████ ██      ██ ██   ██ ██   ██ ███████
+-- 
+-- ███████  ██████  ██    ██  █████  ██████  ███████
+-- ██      ██    ██ ██    ██ ██   ██ ██   ██ ██
+-- ███████ ██    ██ ██    ██ ███████ ██████  █████
+--      ██ ██ ▄▄ ██ ██    ██ ██   ██ ██   ██ ██
+-- ███████  ██████   ██████  ██   ██ ██   ██ ███████
+--             ▀▀
+
+--- Creates a square spiral that fills the defined region.
+-- @param	pos1			Vector3		The 1st position of the defined region.
+-- @param	pos2			Vector3		The 2nd position of the defined region.
+-- @param	target_node		Vector3		The *normalised* name of the node to use to build the square spiral with.
+-- @param	interval		number		The distance between the walls of the spiral.
+-- @param	acceleration=0	number		Increate the interval by this number every time we hit a corner of the square spiral.
+-- @returns	bool,number|string			A success boolean value, followed by either the number of the nodes set or an error message string.
+function worldeditadditions.spiral_square(pos1, pos2, target_node, interval, acceleration)
+	if not acceleration then acceleration = 0 end
+	
+	pos1, pos2 = Vector3.sort(pos1, pos2)
+	local volume = pos2:subtract(pos1)
+	local volume_half = volume:divide(2)
+	
+	print("DEBUG:spiral_square | pos1: "..pos1..", pos2: "..pos2..", target_node: "..target_node)
+	
+	
+	-- Fetch the nodes in the specified area
+	local manip, area = worldedit.manip_helpers.init(pos1, pos2)
+	local data = manip:get_data()
+	
+	local node_id = minetest.get_content_id(target_node)
+	
+	local count = 0 -- The number of nodes replaced
+	
+	local centre = pos2:subtract(pos1):floor()
+	
+	local pos_current = centre:clone()
+	local pos_corner_last = pos_current:clone()
+	local side_length = 0
+	local direction = Vector3.new(1, 0, 0)
+	local side_length_max = interval
+	
+	while pos_current:is_contained(pos1, pos2) do
+		
+		for y = pos2.y, pos1.y, -1 do
+			data[area:index(pos_current.x, y, pos_current.z)] = node_id
+			count = count + 1
+		end
+		
+		pos_current = pos_current:add(direction)
+		side_length = side_length + 1
+		
+		if side_length > side_length_max then
+			side_length_max = side_length_max + interval + acceleration
+			
+			if direction.x == 0 and direction.z == 1 then
+				direction.x = 1
+				direction.z = 0
+			elseif direction.x == 1 and direction.z == 0 then
+				direction.x = 0
+				direction.z = -1
+			elseif direction.x == 0 and direction.z == -1 then
+				direction.x = -1
+				direction.z = 0
+			else
+				direction.x = 0
+				direction.z = 1
+			end
+		end
+	end
+	
+	-- Save the modified nodes back to disk & return
+	worldedit.manip_helpers.finish(manip, data)
+	
+	return true, count
+end