something

xv=20
yv=20
display = Instance.new("Model",workspace)
display.Name = "Display".. tostring(xv) .."x".. tostring(yv)
for x=1, xv do
    folder = Instance.new("Folder",display)
    folder.Name = "X:" .. tostring(x)
    for y=1, yv do
        coroutine.resume(coroutine.create(function()
            pixelpart = Instance.new("Part",folder)
            pixelpart.Size = Vector3.new(1,1,1)
            pixelpart.Position = Vector3.new(x,y,0)
            pixelpart.Material = Enum.Material.ForceField
            pixelpart.Name = "X:" .. tostring(x) .. " Y:".. tostring(y)
            pixelpart.Anchored = true
            pixelpart.CastShadow = false
        end))
    end
end
script.Parent = display
wait(1)
function pixel(x,y)
    if x> #display:GetChildren() then
        error("TOO HIGH VALUE!!!")
    elseif x< 1 then
        error("TOO LOW VALUE!!!")
    else
        if display:FindFirstChild("X:".. tostring(x)) then
            if display:FindFirstChild("X:".. tostring(x)):FindFirstChild("X:".. tostring(x) .." Y:".. tostring(y)) then
                return display:FindFirstChild("X:".. tostring(x)):FindFirstChild("X:".. tostring(x) .." Y:".. tostring(y))
            end
        end
    end
end
wait(3)
-------- RAINBOW LEAVE IT TO ME
local r = 255
local g = 0
local b = 0
coroutine.resume(coroutine.create(function()
while game:GetService("RunService").Stepped:Wait() do
    for i = 0, 254/5 do
        game:GetService("RunService").Stepped:Wait()
        g = g + 5
    end
    for i = 0, 254/5 do
        game:GetService("RunService").Stepped:Wait()
        r = r - 5
    end
    for i = 0, 254/5 do
        game:GetService("RunService").Stepped:Wait()
        b = b + 5
    end
    for i = 0, 254/5 do
        game:GetService("RunService").Stepped:Wait()
        g = g - 5
    end
    for i = 0, 254/5 do
        game:GetService("RunService").Stepped:Wait()
        r = r + 5
    end
    for i = 0, 254/5 do
        game:GetService("RunService").Stepped:Wait()
        b = b - 5
    end
end
end))
while wait() do
    for y = 1, yv do
        game:GetService("RunService").Stepped:Wait()
        coroutine.resume(coroutine.create(function()
            for x = 1, xv do
                game:GetService("RunService").Stepped:Wait()
                pixel(x,y).Color = Color3.fromRGB(r,g,b)
            end
        end))
    end
end