Expiration of the C-4 visa in Seoul, South Korea, to transfer again to the Tourist Visa

I have a question regarding my current work visa in Seoul, South Korea. I am African American and I currently have a C-4 work visa that will expire next week. I would like to know if I do not have an employer to renew or re-apply for the C-4 visa to stay longer. Can I make a visa for another country and return to South Korea with a 90-day tourist visa to stay longer? until I can get the paperwork to go out and apply for a new work visa if I decide to stay and work in Korea.

Thank you,
I would appreciate any advice