"make a control panel that can edit the fog and make the panel rainbow and use a slider for each option"

-- local script (StarterGUI) 
local player = game.Players.LocalPlayer
local screenGui = Instance.new("ScreenGui", player.PlayerGui)

local controlPanel = Instance.new("Frame", screenGui)
controlPanel.BackgroundColor3 = Color3.fromRGB(255, 0, 0) -- Initial color

local fogSlider = Instance.new("Slider", controlPanel)
fogSlider.Value = game.Lighting.FogEnd
fogSlider.Min = 0
fogSlider.Max = 1000

local rainbowColorSequence = ColorSequence.new({
    ColorSequenceKeypoint.new(0, Color3.fromRGB(255, 0, 0)), -- Red 
    ColorSequenceKeypoint.new(0.16, Color3.fromRGB(255, 127, 0)), -- Orange 
    ColorSequenceKeypoint.new(0.33, Color3.fromRGB(255, 255, 0)), -- Yellow 
    ColorSequenceKeypoint.new(0.5, Color3.fromRGB(0, 255, 0)), -- Green 
    ColorSequenceKeypoint.new(0.66, Color3.fromRGB(0, 0, 255)), -- Blue 
    ColorSequenceKeypoint.new(0.83, Color3.fromRGB(46, 43, 95)), -- Indigo 
    ColorSequenceKeypoint.new(1, Color3.fromRGB(139, 0, 255)), -- Violet 
})

controlPanel.BackgroundTransparency = 0.5
controlPanel.BackgroundColor3 = rainbowColorSequence

fogSlider.Changed:Connect(function(value)
    game.Lighting.FogEnd = value
end)

while true do
    for i = 0, 1, 0.01 do
        controlPanel.BackgroundColor3 = rainbowColorSequence:Evaluate(i)
        wait()
    end
end