Can someone help me, it must when i stand on it they must change the Material

You are not referencing the correct parts, there is no part in the workspace called “material”.

local function onTouch()
    workspace.Part.Material = "Neon"
end

workspace.Part.Touched:Connect(onTouch)

You don’t need the local before the function!

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This is inefficient, use Enum

local function pro()
    workspace.Part.Material = Enum.Material.Sand
end

local function omg()
    workspace.Part2.Material = Enum.Material.Neon
end

workspace.Part.Touched:Connect(pro)
workspace.Part2.Touched:Connect(omg)

Also, to OP - please don’t send screenshots of your code. It’s so much harder to help you if we have to rewrite it rather than just copy and pasting.

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Thank you so much it works :grinning: