〜とおりに: just as, exactly the way

とおりに says an action follows a model exactly — as I say, as it is written, as you saw.

Also known astoori niとおりにjust as japanesethe way that

V(dict/た) / N のとおりにとおりに — just as

Manner / as

Do something exactly as (shown/said): 〜とおりに.

わたしが　する　とおりに、やってください。

Please do it exactly as I do.

とおりに follows a verb (dict or た-form) or a noun + の (説明のとおりに = as explained). It means doing exactly in that manner.