diff --git a/mesecons_delayer/init.lua b/mesecons_delayer/init.lua
index da576ad..7c480c1 100644
--- a/mesecons_delayer/init.lua
+++ b/mesecons_delayer/init.lua
@@ -47,7 +47,8 @@ elseif	i == 2 then delaytime = 0.3
 elseif	i == 3 then delaytime = 0.5
 elseif	i == 4 then delaytime = 1.0 end
 
-boxes = {{ -6/16, -8/16, -6/16, 6/16, -7/16, 6/16 },		-- the main slab
+local boxes = {
+	 { -6/16, -8/16, -6/16, 6/16, -7/16, 6/16 },		-- the main slab
 
 	 { -2/16, -7/16, -4/16, 2/16, -26/64, -3/16 },		-- the jeweled "on" indicator
 	 { -3/16, -7/16, -3/16, 3/16, -26/64, -2/16 },
@@ -57,7 +58,8 @@ boxes = {{ -6/16, -8/16, -6/16, 6/16, -7/16, 6/16 },		-- the main slab
 
 	 { -6/16, -7/16, -6/16, -4/16, -27/64, -4/16 },		-- the timer indicator
 	 { -8/16, -8/16, -1/16, -6/16, -7/16, 1/16 },		-- the two wire stubs
-	 { 6/16, -8/16, -1/16, 8/16, -7/16, 1/16 }}
+	 { 6/16, -8/16, -1/16, 8/16, -7/16, 1/16 }
+}
 
 minetest.register_node("mesecons_delayer:delayer_off_"..tostring(i), {
 	description = "Delayer",
diff --git a/mesecons_extrawires/crossover.lua b/mesecons_extrawires/crossover.lua
index bbf00ff..7dc35f2 100644
--- a/mesecons_extrawires/crossover.lua
+++ b/mesecons_extrawires/crossover.lua
@@ -1,4 +1,4 @@
-function crossover_get_rules(node)
+local function crossover_get_rules(node)
 	return {
 		{--first wire
 			{x=-1,y=0,z=0},
diff --git a/mesecons_gates/init.lua b/mesecons_gates/init.lua
index f3d6f09..57815ef 100644
--- a/mesecons_gates/init.lua
+++ b/mesecons_gates/init.lua
@@ -54,7 +54,7 @@ local function update_gate(pos, node, link, newstate)
 	end
 end
 
-function register_gate(name, inputnumber, assess, recipe)
+local function register_gate(name, inputnumber, assess, recipe)
 	local get_inputrules = inputnumber == 2 and gate_get_input_rules_twoinputs or
 		gate_get_input_rules_oneinput
 	local description = "Mesecons Logic Gate: "..name
diff --git a/mesecons_insulated/init.lua b/mesecons_insulated/init.lua
index c6fc05e..15b916b 100644
--- a/mesecons_insulated/init.lua
+++ b/mesecons_insulated/init.lua
@@ -1,4 +1,4 @@
-function insulated_wire_get_rules(node)
+local function insulated_wire_get_rules(node)
 	local rules = 	{{x = 1,  y = 0,  z = 0},
 			 {x =-1,  y = 0,  z = 0}}
 	if node.param2 == 1 or node.param2 == 3 then
diff --git a/mesecons_lamp/init.lua b/mesecons_lamp/init.lua
index 362453c..811e659 100644
--- a/mesecons_lamp/init.lua
+++ b/mesecons_lamp/init.lua
@@ -2,7 +2,7 @@
 -- A lamp is "is an electrical device used to create artificial light" (wikipedia)
 -- guess what?
 
-mesecon_lamp_box = {
+local mesecon_lamp_box = {
 	type = "wallmounted",
 	wall_top = {-0.3125,0.375,-0.3125,0.3125,0.5,0.3125},
 	wall_bottom = {-0.3125,-0.5,-0.3125,0.3125,-0.375,0.3125},
diff --git a/mesecons_pistons/init.lua b/mesecons_pistons/init.lua
index 474f621..a52c802 100644
--- a/mesecons_pistons/init.lua
+++ b/mesecons_pistons/init.lua
@@ -1,6 +1,6 @@
 -- Get mesecon rules of pistons
-piston_rules =
-{{x=0,  y=0,  z=1}, --everything apart from z- (pusher side)
+local piston_rules = {
+ {x=0,  y=0,  z=1}, --everything apart from z- (pusher side)
  {x=1,  y=0,  z=0},
  {x=-1, y=0,  z=0},
  {x=1,  y=1,  z=0},
@@ -8,29 +8,32 @@ piston_rules =
  {x=-1, y=1,  z=0},
  {x=-1, y=-1, z=0},
  {x=0,  y=1,  z=1},
- {x=0,  y=-1, z=1}}
+ {x=0,  y=-1, z=1}
+}
 
-local piston_up_rules =
-{{x=0,  y=0,  z=-1}, --everything apart from y+ (pusher side)
+local piston_up_rules = {
+ {x=0,  y=0,  z=-1}, --everything apart from y+ (pusher side)
  {x=1,  y=0,  z=0},
  {x=-1, y=0,  z=0},
  {x=0,  y=0,  z=1},
  {x=1,  y=-1, z=0},
  {x=-1, y=-1, z=0},
  {x=0,  y=-1, z=1},
- {x=0,  y=-1, z=-1}}
+ {x=0,  y=-1, z=-1}
+}
 
-local piston_down_rules =
-{{x=0,  y=0,  z=-1}, --everything apart from y- (pusher side)
+local piston_down_rules = {
+ {x=0,  y=0,  z=-1}, --everything apart from y- (pusher side)
  {x=1,  y=0,  z=0},
  {x=-1, y=0,  z=0},
  {x=0,  y=0,  z=1},
  {x=1,  y=1, z=0},
  {x=-1, y=1, z=0},
  {x=0,  y=1, z=1},
- {x=0,  y=1, z=-1}}
+ {x=0,  y=1, z=-1}
+}
 
-local piston_get_rules = function (node)
+local function piston_get_rules(node)
 	local rules = piston_rules
 	for i = 1, node.param2 do
 		rules = mesecon.rotate_rules_left(rules)
@@ -38,7 +41,7 @@ local piston_get_rules = function (node)
 	return rules
 end
 
-piston_facedir_direction = function (node)
+local function piston_facedir_direction(node)
 	local rules = {{x = 0, y = 0, z = -1}}
 	for i = 1, node.param2 do
 		rules = mesecon.rotate_rules_left(rules)
@@ -46,7 +49,7 @@ piston_facedir_direction = function (node)
 	return rules[1]
 end
 
-piston_get_direction = function(dir, node)
+local function piston_get_direction(dir, node)
 	if type(dir) == "function" then
 		return dir(node)
 	else
diff --git a/mesecons_pressureplates/init.lua b/mesecons_pressureplates/init.lua
index 858f6ab..cd4529b 100644
--- a/mesecons_pressureplates/init.lua
+++ b/mesecons_pressureplates/init.lua
@@ -8,7 +8,7 @@ local pp_box_on = {
 	fixed = { -7/16, -8/16, -7/16, 7/16, -7.5/16, 7/16 },
 }
 
-pp_on_timer = function (pos, elapsed)
+local function pp_on_timer(pos, elapsed)
 	local node = minetest.get_node(pos)
 	local basename = minetest.registered_nodes[node.name].pressureplate_basename
 
diff --git a/mesecons_wires/init.lua b/mesecons_wires/init.lua
index 879cfa1..ced7c99 100644
--- a/mesecons_wires/init.lua
+++ b/mesecons_wires/init.lua
@@ -140,7 +140,7 @@ nid_inc = function (nid)
 	return i <= 8
 end
 
-register_wires = function()
+local function register_wires()
 	local nid = {}
 	while true do
 		-- Create group specifiction and nodeid string (see note above for details)