NEON OUTLINE (READ DESCRIPTION TO APPLY)

YOU CAN CHANGE THE COLOR ACCORDING TO YOUR CHOICE BUT REMEMBER TO PRE COMP YOUR MAIN CLIP THEN OPEN THE PRE COMP AND DUPLICATE IT INSIDE OF IT THEN ROTO BRUSH IT TO REMOVE BG, THEN SCALE UP THE MAIN CLIP (MAIN CLIP SHOULD BE BEHIND THE DUPLICATED CLIP) and yes you have to remove bg of the duplicated clip not the main one so after doing this shit , simply scale the main clip up a bit and then change color of according to your choice and you're done!