Auto fill in fields on base from a lookup field

Auto fill in fields on base from a lookup field

Hi,
I'm new to Zoho. i'll build a form where  the first field (name)  is a lookup field (from the table Customers).
When my users select a client.
So far so good that's not a problem to build.
The 2 (adress), 3 (zipcode)  & 4 (City) fields must be auto fill with the data witch is also on the table Customers. 
And i don't know how to build that or how to construct that

Can someone please help me with this.
Kind regards
Maarten