If the Supreme court states that a law is constitutional, can the same kind of law be written by other states?

Yes, it works sort of like a mom and a parent. If the parent says its ok that she can eat in her room, then by that logic, the child can too eat in his room because the authority did it first.

Hope this helps!

(also note, i'm no expert on law and i'm also doing an exam, soo...yeah)

what the first or next guy says

whats the question? im not quite understanding your question.