diff --git a/README.md b/README.md
index 1f89620..9e28c15 100644
--- a/README.md
+++ b/README.md
@@ -8,7 +8,7 @@ These are my attempts on [AoC 2022](https://adventofcode.com/2022/)
 | [02](day02)  |   ⭐   |   ⭐   | C        |
 | [03](day03)  |   ⭐   |   ⭐   | Rust     |
 | [04](day04)  |   ⭐   |   ⭐   | Haskell  |
-| 05           |        |        |          |
+| [05](day05)  |   ⭐   |   ⭐   | Lua      |
 | 06           |        |        |          |
 | 07           |        |        |          |
 | 08           |        |        |          |
diff --git a/day05/input.txt b/day05/input.txt
new file mode 100644
index 0000000..e83836d
--- /dev/null
+++ b/day05/input.txt
@@ -0,0 +1,513 @@
+    [P]                 [C] [C]    
+    [W]         [B]     [G] [V] [V]
+    [V]         [T] [Z] [J] [T] [S]
+    [D] [L]     [Q] [F] [Z] [W] [R]
+    [C] [N] [R] [H] [L] [Q] [F] [G]
+[F] [M] [Z] [H] [G] [W] [L] [R] [H]
+[R] [H] [M] [C] [P] [C] [V] [N] [W]
+[W] [T] [P] [J] [C] [G] [W] [P] [J]
+ 1   2   3   4   5   6   7   8   9 
+
+move 2 from 4 to 9
+move 5 from 2 to 9
+move 1 from 5 to 1
+move 3 from 1 to 4
+move 2 from 4 to 6
+move 7 from 6 to 9
+move 5 from 3 to 9
+move 1 from 8 to 6
+move 3 from 2 to 3
+move 12 from 9 to 3
+move 4 from 9 to 7
+move 15 from 3 to 9
+move 1 from 1 to 5
+move 2 from 6 to 5
+move 18 from 9 to 1
+move 6 from 8 to 1
+move 1 from 8 to 7
+move 5 from 7 to 2
+move 6 from 1 to 2
+move 7 from 9 to 6
+move 6 from 1 to 3
+move 5 from 3 to 9
+move 3 from 9 to 1
+move 1 from 7 to 9
+move 4 from 2 to 1
+move 5 from 6 to 3
+move 1 from 3 to 4
+move 1 from 5 to 9
+move 2 from 9 to 6
+move 5 from 5 to 9
+move 10 from 1 to 8
+move 4 from 3 to 8
+move 3 from 4 to 9
+move 4 from 6 to 9
+move 14 from 8 to 6
+move 1 from 3 to 8
+move 14 from 9 to 4
+move 6 from 1 to 6
+move 1 from 8 to 2
+move 3 from 5 to 8
+move 1 from 8 to 9
+move 1 from 8 to 1
+move 5 from 4 to 9
+move 1 from 8 to 4
+move 3 from 9 to 4
+move 3 from 7 to 5
+move 7 from 6 to 3
+move 7 from 4 to 1
+move 3 from 9 to 1
+move 7 from 2 to 3
+move 1 from 4 to 8
+move 8 from 6 to 2
+move 2 from 7 to 4
+move 1 from 7 to 4
+move 1 from 7 to 9
+move 1 from 5 to 9
+move 1 from 9 to 4
+move 1 from 4 to 2
+move 8 from 4 to 9
+move 1 from 4 to 2
+move 5 from 9 to 4
+move 2 from 6 to 9
+move 1 from 6 to 9
+move 1 from 8 to 1
+move 13 from 3 to 2
+move 1 from 3 to 9
+move 2 from 6 to 8
+move 1 from 8 to 1
+move 14 from 1 to 7
+move 4 from 2 to 1
+move 2 from 9 to 5
+move 3 from 9 to 7
+move 1 from 8 to 2
+move 4 from 1 to 5
+move 1 from 4 to 7
+move 3 from 9 to 1
+move 7 from 7 to 4
+move 14 from 2 to 8
+move 3 from 1 to 7
+move 3 from 5 to 4
+move 2 from 1 to 9
+move 11 from 8 to 9
+move 3 from 7 to 8
+move 3 from 8 to 6
+move 6 from 4 to 3
+move 2 from 6 to 8
+move 8 from 4 to 3
+move 3 from 8 to 7
+move 2 from 8 to 2
+move 2 from 3 to 9
+move 1 from 6 to 8
+move 5 from 2 to 7
+move 10 from 9 to 7
+move 1 from 8 to 5
+move 3 from 5 to 2
+move 6 from 7 to 5
+move 19 from 7 to 3
+move 9 from 5 to 9
+move 6 from 2 to 6
+move 2 from 7 to 3
+move 29 from 3 to 8
+move 2 from 7 to 9
+move 5 from 8 to 1
+move 12 from 9 to 6
+move 1 from 3 to 8
+move 1 from 2 to 7
+move 1 from 3 to 1
+move 10 from 6 to 1
+move 1 from 6 to 7
+move 9 from 1 to 9
+move 2 from 1 to 2
+move 12 from 9 to 4
+move 7 from 6 to 3
+move 8 from 3 to 7
+move 5 from 7 to 6
+move 19 from 8 to 3
+move 10 from 4 to 6
+move 1 from 4 to 6
+move 6 from 8 to 6
+move 1 from 4 to 2
+move 6 from 6 to 3
+move 3 from 2 to 7
+move 13 from 6 to 3
+move 1 from 9 to 1
+move 6 from 1 to 8
+move 1 from 6 to 5
+move 1 from 5 to 4
+move 3 from 7 to 1
+move 2 from 1 to 3
+move 11 from 3 to 8
+move 1 from 4 to 3
+move 3 from 8 to 4
+move 1 from 7 to 5
+move 3 from 8 to 9
+move 2 from 9 to 2
+move 7 from 8 to 3
+move 1 from 7 to 9
+move 1 from 1 to 4
+move 32 from 3 to 4
+move 1 from 5 to 9
+move 2 from 8 to 3
+move 2 from 6 to 4
+move 1 from 9 to 4
+move 1 from 9 to 2
+move 3 from 3 to 1
+move 1 from 8 to 6
+move 1 from 6 to 2
+move 1 from 9 to 3
+move 1 from 1 to 7
+move 1 from 8 to 7
+move 2 from 3 to 8
+move 1 from 8 to 4
+move 1 from 1 to 2
+move 2 from 4 to 8
+move 1 from 1 to 8
+move 26 from 4 to 6
+move 3 from 8 to 5
+move 3 from 7 to 6
+move 7 from 6 to 3
+move 18 from 6 to 8
+move 16 from 8 to 9
+move 1 from 5 to 1
+move 2 from 8 to 3
+move 3 from 9 to 8
+move 3 from 6 to 4
+move 2 from 5 to 4
+move 1 from 6 to 4
+move 2 from 7 to 2
+move 2 from 3 to 9
+move 4 from 8 to 3
+move 1 from 1 to 2
+move 6 from 9 to 7
+move 2 from 2 to 5
+move 12 from 3 to 1
+move 9 from 9 to 2
+move 10 from 1 to 3
+move 2 from 5 to 9
+move 8 from 4 to 7
+move 13 from 7 to 6
+move 6 from 6 to 5
+move 4 from 5 to 3
+move 2 from 5 to 4
+move 8 from 4 to 3
+move 1 from 7 to 2
+move 15 from 2 to 7
+move 8 from 3 to 7
+move 1 from 1 to 6
+move 7 from 7 to 1
+move 5 from 1 to 6
+move 7 from 3 to 2
+move 3 from 1 to 6
+move 12 from 7 to 9
+move 12 from 9 to 8
+move 1 from 7 to 1
+move 2 from 9 to 5
+move 1 from 1 to 9
+move 4 from 4 to 2
+move 4 from 8 to 4
+move 2 from 7 to 2
+move 4 from 6 to 5
+move 4 from 8 to 9
+move 1 from 8 to 4
+move 5 from 5 to 3
+move 5 from 2 to 4
+move 5 from 9 to 5
+move 1 from 3 to 6
+move 1 from 7 to 8
+move 12 from 3 to 9
+move 4 from 2 to 6
+move 7 from 4 to 9
+move 13 from 6 to 4
+move 3 from 6 to 9
+move 4 from 4 to 2
+move 1 from 3 to 4
+move 21 from 9 to 7
+move 4 from 2 to 1
+move 3 from 5 to 4
+move 8 from 7 to 6
+move 2 from 7 to 2
+move 11 from 4 to 2
+move 1 from 9 to 7
+move 1 from 5 to 7
+move 1 from 1 to 8
+move 5 from 2 to 5
+move 1 from 3 to 5
+move 2 from 4 to 9
+move 3 from 4 to 8
+move 3 from 1 to 8
+move 1 from 9 to 6
+move 8 from 7 to 8
+move 9 from 6 to 5
+move 1 from 9 to 6
+move 1 from 6 to 4
+move 3 from 7 to 5
+move 1 from 6 to 9
+move 12 from 5 to 1
+move 2 from 5 to 8
+move 1 from 9 to 6
+move 2 from 7 to 6
+move 9 from 1 to 8
+move 1 from 6 to 9
+move 1 from 9 to 2
+move 1 from 4 to 2
+move 2 from 6 to 7
+move 5 from 8 to 3
+move 2 from 7 to 4
+move 16 from 8 to 5
+move 2 from 3 to 8
+move 7 from 5 to 1
+move 3 from 3 to 8
+move 7 from 5 to 7
+move 4 from 5 to 2
+move 6 from 7 to 9
+move 2 from 9 to 6
+move 2 from 9 to 2
+move 1 from 6 to 8
+move 12 from 2 to 6
+move 2 from 9 to 6
+move 1 from 5 to 2
+move 3 from 5 to 4
+move 9 from 2 to 6
+move 6 from 8 to 3
+move 1 from 7 to 5
+move 1 from 6 to 7
+move 1 from 7 to 8
+move 1 from 5 to 8
+move 5 from 1 to 2
+move 3 from 4 to 5
+move 4 from 6 to 8
+move 5 from 2 to 9
+move 5 from 8 to 4
+move 1 from 1 to 4
+move 9 from 8 to 4
+move 1 from 2 to 3
+move 3 from 6 to 8
+move 4 from 9 to 2
+move 2 from 6 to 4
+move 2 from 3 to 1
+move 4 from 4 to 7
+move 6 from 4 to 5
+move 10 from 6 to 8
+move 4 from 1 to 9
+move 4 from 7 to 5
+move 3 from 3 to 9
+move 6 from 9 to 8
+move 2 from 2 to 9
+move 8 from 4 to 3
+move 2 from 2 to 7
+move 1 from 4 to 9
+move 6 from 3 to 8
+move 2 from 7 to 8
+move 6 from 5 to 9
+move 5 from 5 to 6
+move 2 from 5 to 9
+move 7 from 9 to 5
+move 2 from 1 to 9
+move 6 from 5 to 8
+move 1 from 5 to 1
+move 2 from 3 to 6
+move 1 from 3 to 6
+move 4 from 9 to 5
+move 1 from 3 to 4
+move 1 from 1 to 2
+move 1 from 2 to 1
+move 1 from 6 to 8
+move 14 from 8 to 5
+move 6 from 5 to 1
+move 16 from 8 to 3
+move 2 from 8 to 2
+move 10 from 6 to 7
+move 1 from 6 to 9
+move 2 from 2 to 9
+move 2 from 7 to 3
+move 1 from 8 to 5
+move 3 from 9 to 1
+move 4 from 9 to 5
+move 9 from 3 to 8
+move 2 from 3 to 6
+move 5 from 3 to 8
+move 1 from 4 to 2
+move 12 from 8 to 4
+move 1 from 8 to 9
+move 4 from 5 to 9
+move 7 from 7 to 1
+move 10 from 5 to 2
+move 2 from 5 to 2
+move 1 from 6 to 5
+move 2 from 5 to 2
+move 5 from 2 to 6
+move 4 from 9 to 6
+move 6 from 4 to 9
+move 2 from 3 to 4
+move 6 from 4 to 7
+move 6 from 7 to 5
+move 10 from 1 to 5
+move 4 from 1 to 2
+move 4 from 6 to 3
+move 6 from 9 to 7
+move 2 from 4 to 9
+move 7 from 7 to 6
+move 1 from 9 to 7
+move 2 from 9 to 8
+move 2 from 8 to 2
+move 1 from 2 to 5
+move 3 from 8 to 4
+move 4 from 2 to 7
+move 3 from 4 to 7
+move 2 from 3 to 5
+move 2 from 3 to 2
+move 18 from 5 to 3
+move 6 from 3 to 1
+move 8 from 3 to 1
+move 8 from 7 to 9
+move 9 from 2 to 5
+move 3 from 2 to 3
+move 7 from 3 to 7
+move 3 from 6 to 4
+move 1 from 7 to 1
+move 7 from 6 to 7
+move 1 from 2 to 9
+move 1 from 4 to 2
+move 13 from 7 to 2
+move 10 from 5 to 3
+move 1 from 2 to 9
+move 7 from 1 to 5
+move 8 from 9 to 5
+move 1 from 9 to 5
+move 1 from 9 to 8
+move 1 from 8 to 2
+move 8 from 5 to 3
+move 18 from 3 to 5
+move 2 from 4 to 1
+move 3 from 2 to 5
+move 27 from 5 to 1
+move 17 from 1 to 5
+move 2 from 2 to 3
+move 1 from 6 to 5
+move 2 from 2 to 5
+move 1 from 6 to 4
+move 1 from 6 to 9
+move 2 from 3 to 5
+move 17 from 5 to 6
+move 1 from 9 to 3
+move 6 from 2 to 4
+move 1 from 3 to 2
+move 3 from 4 to 9
+move 1 from 2 to 9
+move 1 from 4 to 7
+move 3 from 5 to 2
+move 2 from 5 to 1
+move 1 from 5 to 2
+move 1 from 7 to 3
+move 18 from 1 to 4
+move 1 from 3 to 1
+move 5 from 4 to 2
+move 1 from 5 to 1
+move 9 from 2 to 7
+move 1 from 4 to 5
+move 1 from 2 to 9
+move 8 from 6 to 2
+move 13 from 4 to 2
+move 2 from 4 to 9
+move 1 from 5 to 2
+move 1 from 6 to 8
+move 6 from 7 to 5
+move 1 from 8 to 4
+move 1 from 7 to 6
+move 1 from 6 to 1
+move 7 from 6 to 5
+move 1 from 7 to 9
+move 6 from 9 to 3
+move 2 from 9 to 7
+move 2 from 5 to 7
+move 4 from 7 to 8
+move 4 from 5 to 4
+move 1 from 6 to 7
+move 3 from 3 to 8
+move 6 from 5 to 9
+move 2 from 3 to 5
+move 4 from 4 to 7
+move 1 from 3 to 1
+move 2 from 2 to 3
+move 6 from 9 to 6
+move 1 from 7 to 1
+move 19 from 2 to 4
+move 2 from 5 to 6
+move 2 from 8 to 9
+move 2 from 1 to 2
+move 2 from 2 to 5
+move 2 from 4 to 3
+move 4 from 6 to 2
+move 1 from 7 to 8
+move 6 from 1 to 8
+move 3 from 5 to 1
+move 5 from 2 to 5
+move 1 from 6 to 7
+move 9 from 8 to 1
+move 2 from 3 to 6
+move 4 from 6 to 5
+move 1 from 6 to 2
+move 9 from 5 to 2
+move 3 from 4 to 6
+move 12 from 4 to 6
+move 1 from 9 to 4
+move 1 from 3 to 1
+move 3 from 4 to 8
+move 1 from 3 to 6
+move 6 from 6 to 2
+move 1 from 4 to 5
+move 3 from 6 to 2
+move 4 from 1 to 5
+move 1 from 5 to 1
+move 2 from 8 to 9
+move 7 from 6 to 3
+move 1 from 3 to 1
+move 1 from 8 to 1
+move 3 from 8 to 9
+move 4 from 3 to 5
+move 3 from 7 to 3
+move 5 from 3 to 7
+move 1 from 9 to 1
+move 4 from 9 to 2
+move 15 from 2 to 7
+move 14 from 1 to 7
+move 5 from 5 to 1
+move 9 from 7 to 2
+move 1 from 9 to 6
+move 1 from 7 to 4
+move 1 from 4 to 6
+move 2 from 6 to 2
+move 9 from 2 to 5
+move 4 from 2 to 4
+move 4 from 7 to 5
+move 6 from 5 to 9
+move 7 from 1 to 8
+move 6 from 2 to 8
+move 1 from 1 to 2
+move 3 from 9 to 5
+move 18 from 7 to 8
+move 2 from 4 to 6
+move 2 from 4 to 6
+move 3 from 7 to 6
+move 3 from 5 to 3
+move 1 from 2 to 6
+move 5 from 6 to 8
+move 29 from 8 to 1
+move 2 from 3 to 5
+move 25 from 1 to 6
+move 2 from 9 to 5
+move 1 from 7 to 8
+move 6 from 8 to 2
+move 1 from 9 to 1
+move 15 from 6 to 8
+move 1 from 3 to 8
+move 14 from 8 to 7
+move 5 from 1 to 3
+move 1 from 6 to 2
+move 2 from 5 to 7
+move 10 from 6 to 2
+move 4 from 5 to 7
+move 6 from 5 to 1
+move 2 from 1 to 4
+move 19 from 7 to 9
diff --git a/day05/input_demo.txt b/day05/input_demo.txt
new file mode 100644
index 0000000..84933bb
--- /dev/null
+++ b/day05/input_demo.txt
@@ -0,0 +1,9 @@
+    [D]    
+[N] [C]    
+[Z] [M] [P]
+ 1   2   3 
+
+move 1 from 2 to 1
+move 3 from 1 to 3
+move 2 from 2 to 1
+move 1 from 1 to 2
diff --git a/day05/solution.lua b/day05/solution.lua
new file mode 100644
index 0000000..eb9927c
--- /dev/null
+++ b/day05/solution.lua
@@ -0,0 +1,157 @@
+Stack = {}
+
+function Stack:new()
+    local o = {}
+    setmetatable(o, self)
+    self.__index = self
+    return o
+end
+
+function Stack:push(value)
+    table.insert(self, value)
+end
+
+function Stack:pop()
+    return table.remove(self)
+end
+
+function Stack:top()
+    return self[#self]
+end
+
+function Stack:reverse()
+    local newStack = Stack:new()
+    while #self > 0 do
+        newStack:push(self:pop())
+    end
+    return newStack
+end
+
+function Split(s, delimiter)
+    result = {};
+    for match in (s..delimiter):gmatch("(.-)"..delimiter) do
+        table.insert(result, match);
+    end
+    return result;
+end
+
+function deepcopy(orig, copies)
+    copies = copies or {}
+    local orig_type = type(orig)
+    local copy
+    if orig_type == 'table' then
+        if copies[orig] then
+            copy = copies[orig]
+        else
+            copy = {}
+            copies[orig] = copy
+            for orig_key, orig_value in next, orig, nil do
+                copy[deepcopy(orig_key, copies)] = deepcopy(orig_value, copies)
+            end
+            setmetatable(copy, deepcopy(getmetatable(orig), copies))
+        end
+    else -- number, string, boolean, etc
+        copy = orig
+    end
+    return copy
+end
+
+-- Read input data
+
+if arg[1] == nil then
+    print("Usage: "..arg[0].." <filename>")
+    os.exit(1)
+end
+file = io.open(arg[1], "r")
+if file == nil then
+    print("File not found: "..arg[1])
+    os.exit(1)
+end
+
+-- Parse input data
+
+inputLines = file:read("all")
+file:close()
+
+parts = Split(inputLines, "\n\n")
+initialState = Split(parts[1], "\n")
+moves = Split(parts[2], "\n")
+
+-- Initialize stacks
+stackCount = (#initialState[1] + 1) // 4
+stacks = {}
+for i = 1, stackCount do
+    stacks[i] = Stack:new()
+end
+
+-- Fill stacks
+for i = 1, #initialState-1 do
+    for j = 1, stackCount do
+      letter = string.sub(initialState[i], 4 * j - 2, 4 * j - 2)
+      if letter ~= " " then
+        stacks[j]:push(letter)
+      end
+    end
+end
+
+for i = 1, #stacks do
+  stacks[i] = stacks[i]:reverse()
+end
+
+stacks2 = deepcopy(stacks)
+
+print("Initial state:")
+for i = 1, stackCount do
+    print("Stack "..i..": "..table.concat(stacks[i], " "))
+end
+
+-- Perform moves
+
+-- Part 1
+
+for i = 1, #moves do
+    move = Split(moves[i], " ")
+    count = tonumber(move[2])
+    from = tonumber(move[4])
+    to = tonumber(move[6])
+
+    for j = 1, count do
+        stacks[to]:push(stacks[from]:pop())
+    end
+end
+
+part1 = ""
+for i = 1, stackCount do
+    part1 = part1..stacks[i]:top()
+end
+
+print("Part 1: "..part1)
+
+-- print("Final state:")
+-- for i = 1, stackCount do
+--     print("Stack "..i..": "..table.concat(stacks[i], " "))
+-- end
+
+-- Part 2
+for i = 1, #moves do
+    move = Split(moves[i], " ")
+    count = tonumber(move[2])
+    from = tonumber(move[4])
+    to = tonumber(move[6])
+  
+    temp = Stack:new()
+    for j = 1, count do
+        temp:push(stacks2[from]:pop())
+    end
+    -- print("Move "..i..": "..table.concat(temp, " "))
+    for j = 1, count do
+        stacks2[to]:push(temp:pop())
+    end
+end
+
+part2 = ""
+for i = 1, stackCount do
+    part2 = part2..stacks2[i]:top()
+end
+
+print("Part 2: "..part2)