Halo, this is an imperative sentence, so Design is verb, not a noun, examples, Design it ( desain itu ), Design this ( desain ini ).
The imperative tense in English is used to give an order, a warning, an appeal, an advice, a suggestion, an instruction and in some cases a request to another person, to a group of people or to animals. It is very easy to form the imperative sentence: Simply take the verbs' infinitive form (without the "to" infinitive indicator). Usually the verb will be placed at the beginning of the sentence.
In the imperative sentence, the pronoun You ( singular or plural ) is always implied: ( You ) Help me, please! ( Anda ) Tolong bantu saya! ( You ) Design this now! ( Kamu ) Desain ini sekarang!