Random

function ranbow(SP)
    local function rgb(RED,GREEN,BLUE)
        local Count = 1 / 255
        --Red Count
        local red = Count * RED
        --Green Count
        local green = Count * GREEN
        --Blue Count
        local blue = Count * BLUE
        --Give Color3
        local FColor = Color3.new(red,green,blue)
        return FColor
    end
    coroutine.resume(coroutine.create(function()
        while true do
            game.TweenService:Create(SP, TweenInfo.new(2,Enum.EasingStyle.Linear,Enum.EasingDirection.Out,0,false,0), {Color = rgb(0, 255, 0)}):Play()
            wait(2)
            game.TweenService:Create(SP, TweenInfo.new(2,Enum.EasingStyle.Linear,Enum.EasingDirection.Out,0,false,0), {Color = rgb(0, 0, 255)}):Play()
            wait(2)
            game.TweenService:Create(SP, TweenInfo.new(2,Enum.EasingStyle.Linear,Enum.EasingDirection.Out,0,false,0), {Color = rgb(255, 0, 0)}):Play()
            wait(2)
        end
    end))
end

local Point1 = Vector3.new(-2500,-10,-2500)
local Point2 = Vector3.new(2500,2500,2000)
local Region = Region3.new(Point1,Point2)
for _,Part in pairs(game.Workspace:FindPartsInRegion3(Region,nil,math.huge)) do
ranbow(Part)
end