Hello, I have become an American citizen but I want to keep my Spanish citizenship. What should I do to keep it? What steps should I take?

Foreign consulate

443 Shatto Pl, Los Angeles, CA 90020, USA

Foreign consulate

11766 Wilshire Blvd #1250, Los Angeles, CA 90025, USA

Foreign consulate

12424 Wilshire Blvd #1170, Los Angeles, CA 90025, USA

Foreign consulate

11766 Wilshire Blvd #440, Los Angeles, CA 90025, USA

Foreign consulate

2029 Century Park E #3150, Los Angeles, CA 90067, USA

Foreign consulate

611 N Larchmont Blvd #2, Los Angeles, CA 90004, USA

Foreign consulate

550 S Hope St #9, Los Angeles, CA 90071, USA

Foreign consulate

1900 Avenue of the Stars # 1250, Los Angeles, CA 90067, USA