My math isn't counting to change the text?

Hey there, a few things with this script:

1. You're putting a Statement as a Event which doesn't work. You could: 1. Make it a normal event or 2. something.Event:Wait() which will wait until the event happens. (More explanation on wiki)

2. When scripting notice how the word "math" changes colors, I believe that is enough of a signal to tell you not to write that as a Variable name, a better name would be something like count

Ok, so how do you fix this script? First we write all the variables that may be used:

local plr = game.Player.LocalPlayer -- this may be useless now but may be useful later on.
local state = script.Parent.State
local count = 1

Ok, now what we want to do is make a function, this function will update the text. This may seem a bit advanced but it's basically a variable for a set of command. Let's called our function UpdateState()

local plr = game.Player.LocalPlayer -- this may be useless now but may be useful later on.
local state = script.Parent.State
local count = 1

local function UpdateState()

end

Now we want to input your if statements in. We also want to add elseif's these bad boys will help reduce your lines.

local plr = game.Player.LocalPlayer -- this may be useless now but may be useful later on.
local state = script.Parent.State
local count = 1

local function UpdateState()
    if count == 1 then
            state.Text = "Responding"
    elseif count == 2 then
        state.Text = 'OnStation' -- you can also quote with '
    elseif count == 3 then
        state.Text = 'OnScene'
    elseif count == 4 then
        count = 1
    end
end

Now let's do the following:

1. Call the function so it runs
2. Fix your events

local plr = game.Player.LocalPlayer -- this may be useless now but may be useful later on.
local state = script.Parent.State
local count = 1

local function UpdateState()
    if count == 1 then
            state.Text = "Responding"
    elseif count == 2 then
        state.Text = 'OnStation' -- you can also quote with '
    elseif count == 3 then
        state.Text = 'OnScene'
    elseif count == 4 then
        count = 1
    end
end

UpdateState()

script.Parent.Up.MouseButton1Down:Connect(function() -- avoid :connect and use :Connect
    count = count + 1
    print(count)
    UpdateState() -- update
end)

script.Parent.Down.MouseButton1Down:Connect(function()
    count = count - 1
    print(count)
    UpdateState()
end)

A few notes:

1. this script will WORK to a degree
2. You will have an issue of people spamming the buttons
3. you will have an issue of where count goes into the negatives

Now I will let you solve these on your own.

Hopefully, this helped.

Best of luck developer!

This is because you are trying to create the function within an if statement, which is bound to throw you an error. Instead, create it like this:

-- LocalScript

local Math = 1 -- don’t call it math with lowercase m, that’s already a global variable.

script.Parent.Up.MouseButton1Click:Connect(function()
    Math = Math + 1
    print(Math)
end)

script.Parent.Down.MouseButton1Click:Connect(function()
    Math = Math - 1
    print(Math)
end)

If it's click then use MouseButton1Click, otherwise use MouseEnter. Full tutorial on Roblox Wiki