Grimrock

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		{
			class = "Model",
			name = "lock",
			model = "assets/models/env/treasure_chest_lock.fbx",
			offset = vec(0, 0.41406, 0.54883),
			enabled = false,
		},

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isCompleted = false
counter = 1

function click(button)
	if not isCompleted then
		local seq = { 
			"puzzlebutton1",
			"puzzlebutton1",
			"puzzlebutton2",
			"puzzlebutton3",
			"puzzlebutton4",
		}
		
		-- checks that buttons are pressed in correct order
		if seq[counter] == button.go.id then
			playSound("key_lock")
			counter = counter+1
		else
			counter = 1
		end
		
		-- checks if the combination has been completed
		if counter == #seq+1 then
			puzzledoor.door:open()
			isCompleted = true
			counter = nil
		end
	end
end

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for i = 1,4 do

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dungeon_door_portcullis_1.door:open()

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combination = 44441133323
comb = {}
count = 0
solved = false

function buttonCombination(self)
	--if solved == false then
		count = count + 1
		for i = 1,4 do
			if string.match(self.go.id, i) then
				print(count)
				print(string.len(combination))
				if count <= string.len(combination) then
					comb[count] = i
					local order = table.concat(comb)
					local s, b = string.find(combination, order)
					print(s,b)
					print(order)
					if s == 1 and b == count and count < string.len(combination) then
						playSound("key_lock")
					elseif s == 1 and b == string.len(combination) then
						playSound("key_lock")
						dungeon_door_portcullis_1.door:open()
						solved = true
					else 
						playSound("lock_incorrect")
						for r = 1,string.len(combination) do
							comb[r] = nil
						end
						count = 0
						dungeon_door_portcullis_1.door:close()
					end
				else
					playSound("lock_incorrect")
					for r = 1,string.len(combination) do
						comb[r] = nil
					end
					count = 0
					dungeon_door_portcullis_1.door:close()
				end
			end
		end
	--end
end