NDS Island Retexture

local Island = workspace.Island
local Is2 = Island:FindFirstChild("Island")
    if Is2 == nil then
        local Folder = Instance.new("Folder")
        Folder.Name = "Island"
        Folder.Parent = Island
    end
        while true do
        local Grass = Island:FindFirstChild("Grass")
        local Rocks = Island:FindFirstChild("LowerRocks")
        local Part = Island:FindFirstChild("Part")
            if Grass == nil then
                wait(1)
            else
                local GFolder = Island:FindFirstChild("Island")
                    Grass.Material = "Grass"
                    Grass.Parent = GFolder
                end
            if Rocks == nil then
                wait(.1)
            else
                local RFolder = Island:FindFirstChild("Island")
                    Rocks.Material = "Slate"
                    Rocks.Parent = RFolder
                end
            if Part == nil then
                    wait(.1)
            else
                local RFolder = Island:FindFirstChild("Island")
                    Part.Material = "Slate"
                    Part.Parent = RFolder
            wait(.1)
        end
    wait(.1)
end