1991 firebird wont start back up. on 1991 Pontiac Firebird

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
when i drive for maybe 20 min then shut it off go to start back i get nothing but let set for 4 min start right up.
(2) Answers
what engine is in it?
Is the security light on?