how do i make this script change color for all parts?

i have a folder in workspace called "Spotlights" and in them is my models all named the same: "Spotlight_1" and in them i have a part and in the part i have the beam. how can i change colors for all the "Spotlight_1 " models?

while true do
    script.Parent.Color = ColorSequence.new(Color3.fromRGB(math.random(0,255),math.random(0,255),math.random(0,255)),Color3.fromRGB(math.random(0,255),math.random(0,255),math.random(0,255))) 
    wait(1)
end

I'm on my phone so I can't test if this works, but you could use a for i, v in pairs to find every child of the "Spotlights" folder and change their color

while true do
	for i, v in pairs(workspace.Spotlights:GetChildren()) do
		local beam = v.Part.Beam
		if beam then
			beam.Color = ColorSequence.new(Color3.fromRGB(math.random(0,255),math.random(0,255),math.random(0,255)),Color3.fromRGB(math.random(0,255),math.random(0,255),math.random(0,255))) 
    		wait(1)
		end
	end
end