Emacs blink-matching-paren minor mode does this. It’s quite configurable, like every other thing in Emacs. Some of the alternatives can be found by starting at

Emacs blink-matching-paren minor mode does this. It’s quite configurable, like every other thing in Emacs. Some of the alternatives can be found by starting at: https://www.gnu.org/software/emacs/manual/html_node/emacs/Matching.html https://www.gnu.org/software/emacs/manual/html_node/emacs/Ma...