"If's and and's" Help please? [SOLVED]

Correction

BuzzerOne=game.Workspace.Buzzers.BuzzerOne
BuzzerTwo=game.Workspace.Buzzers.BuzzerTwo
BuzzerThree=game.Workspace.Buzzers.BuzzerThree
Buzzers = {BuzzerOne,BuzzerTwo,BuzzerThree}
Intro=game.Workspace.Intro

function onClick()
    local isvalid = true
    for _,v in pairs(Buzzers) do
        for _,w in pairs(v:GetChildren()) do
            if w.BrickColor ~= BrickColor.Red() then
                isvalid = false
            end
        end
    end
    if isvalid then
        Intro:Play()
    end
end

script.Parent.ClickDetector.MouseClick:connect(onClick)

Explanation

There were parts inside the models. Those are what you have to test the BrickColor on, not the model itself as it has no BrickColor on it.

As the error says,

BuzzerOne (or ..Two or ..Three, I don't know which; but probably all of them) is a Model. Models don't have BrickColor properties, which is your error. Make BuzzerOne refer to a part rather than a model.

If it were a part, your code still wouldn't work. You have to compare the values, not just call .Red() on them. Comparison for equality is done with the == operator (read "is equal to"). It is unrelated to the assignment construct =.

if BuzzerOne.BrickColor == BrickColor.Red() and BuzzerTwo.BrickColor == BrickColor.Red() and BuzzerThree.BrickColor == BrickColor.Red() then

This is just to test with to show that it works this script works with a normal brick, I used name but you could use other. hope this helps

while true do
    if script.Parent.BrickColor.Name == "Bright red" then
        print("ok")
    end
    wait(5)
end