My timer script for minecraft is not working - lua

Question

I have a problem with my Minecraft timer script I tried to add a function that saves the time values from worlds in a document. The timer worked completely fine before i added this function...
Code:
name = "Timer"
description = "Just a normal Timer."
positionX = 0
positionY = 0
sizeX = 24
sizeY = 10
scale = 1
START_STOP_KEY = 0x55 --or 'U'
RESET_KEY = 0x4A --or 'J'
--
--[[
if you wish to change the key you can take the key code from here
https://learn.microsoft.com/en-us/windows/win32/inputdev/virtual-key-codes
]] -------------script-code-------------
previoustime = 0
state = 0
startTime = 0
stopTime = 0
ImportedLib = importLib("readfile.lua")
function keyboard(key, isDown)
if (isDown == true) then
if (key == RESET_KEY) then
state = 0
elseif (key == START_STOP_KEY) then
if (state == 0) then
state = 1
startTime = os.time()
elseif (state == 1) then
state = 2
previoustime = os.time()
stopTime = os.time()
elseif (state == 2) then
state = 1
startTime = startTime + os.time() - stopTime
end
end
end
end
TimerText = "00:00"
TextColor = {r = 30, g = 255, b = 30, a = 255}
function doubleDigit(number)
if (number < 10) then
return "0" .. math.floor(number)
else
return math.floor(number)
end
end
function timeText(time)
local result = ""
local days = 0
while (time > 86399) do
days = days + 1
time = time - 86400
end
local hours = 0
while (time > 3599) do
hours = hours + 1
time = time - 86400
end
local minutes = 0
while (time > 59) do
minutes = minutes + 1
time = time - 60
end
if (days == 0) then
if (hours == 0) then
return doubleDigit(minutes) .. ":" .. doubleDigit(time)
else
return math.floor(hours) .. " : " .. doubleDigit(minutes) .. ":" .. doubleDigit(time)
end
else
return math.floor(days) ..
" : " .. doubleDigit(hours) .. " : " .. doubleDigit(minutes) .. ":" .. doubleDigit(time)
end
end
function update()
if (state == 0) then
TextColor = {r = 255, g = 0, b = 0, a = 255}
TimerText = "00:00"
elseif (state == 1) then
TimerText = timeText(os.time() - startTime)
TextColor = {r = 0, g = 255, b = 255, a = 255}
elseif (state == 2) then
TimerText = timeText(stopTime - startTime)
TextColor = {r = 255, g = 255, b = 0, a = 255}
end
end
function render()
local font = gui.font()
local tw = font.width(TimerText)
gfx.color(0, 0, 0, 0)
gfx.rect(0, 0, tw + 4, 10)
gfx.color(TextColor.r, TextColor.g, TextColor.b, TextColor.a)
gfx.text(2, 1, TimerText)
end
This is the function i want to add
if (state == 1) then
local worldName = server.worldName()
io.open(local worldName".txt", "w")
io.output(file)
io.write(time)
io.close(file)
end
if (state == 0) then
local worldName = server.worldName()
io.open(local worldName".txt", "r")
io.output(file)
time = (file:read())
io.close(file)
end

Answer 1

It appears that you want to concatenate (join) two strings io.open(local worldName".txt", "r"). You should use the concat operator (double dot) for that:
local s1 = "Hello "
local s2 = "World!!!"
local s3 = s1..s2
print(s3)
This program will print the string "Hello world!!" (without the quotes).
Also, the you are only supposed to use the local keyword when declaring a variable.
So:
if (state == 1) then
local worldName = server.worldName()
io.open(worldName..".txt", "w")
io.output(file)
io.write(time)
io.close(file)
end
if (state == 0) then
local worldName = server.worldName()
io.open(worldName..".txt", "r")
io.output(file)
time = (file:read())
io.close(file)
end
This code is the correct version of what you wanted to write. I removed the incorrect uses of the local keyword and added the concat operator.