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2 page form using data from page 1 and facebook pixel

Hey all.
I’m trying to create a landing page, but I would like to use 2 pages to use the facebook pixel.
Step 1: on the landing page, there’s going to be the first question, which will ask for the zip code. This is to track initiated leads. After the lead fills out their zip code, they will be redirected to another page, in which the form continues asking them the rest of the questions. The problem is that I don’t know how to get the data from the first page to merge with the rest. Can someone point me in the right direction?

I’m sorry if this thread has been done before, I just couldn’t find anything similar.