so i have followed a raycasting tutorial (https://www.youtube.com/watch?v=ASVpGeLf_HU. i stopped at 7: 17 bcz i dont need headshot detection) but it says to exclude players to avoid putting the effect on yourself. however, i want to make something that hurts players. i dont want to use things that exclude everyone on a scoreboard in case more that one person tries to use it at once, on eeach other. what can i do?