How to skip fields in forms?

Hello,
It's a pity the old forum is gone. There was a lot of information, and sometimes I could find the answers in the forum.
OK, my problem:
How can I create a logic, to skip certain fields.
Example:
Field: Are you from UK or from USA?
Radiobuttons: UK and USA
When UK chosen go to next field. When USA chosen skip next field and go to another field.
Can you help me with this?
Regards, Peter

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