what i need is to extract out only a few lines(which is shown as above) from a text file.

hi all, i'm new to perl so any help would be much appreciated. i need to sort out this few lines(shown below) from a text file and then write to a new text file. i'm pretty confused with the regex.

; Total registers ; 0 ;
; Total pins ; 2 / 635 ( < 1 % ) ;
; Total virtual pins ; 0 ...