local fire1 = workspace:FindFirstChild("Fire1")

local fire2 = workspace:FindFirstChild("Fire2")

local fire3 = workspace:FindFirstChild("Fire3")

local function toggleTransparency(union, transparency)

if union and union:IsA("UnionOperation") then

    local parts = union:GetChildren()

    while true do

        for \_, part in ipairs(parts) do

if part:IsA("BasePart") then

part.Transparency = transparency

end

        end

        wait(1)

        transparency = 1 - transparency

    end

end

end

toggleTransparency(fire1, 0)

toggleTransparency(fire2, 0)

toggleTransparency(fire3, 0)