need HELP ON MY skript pls can some one help me make this to add +1 heart and not choose random

[ummxyzlol]

on rightclick:
  if player's tool is nether star named "&4Reroll Item":
    set {_MHP} to random integer between 8 and 20
    set player's max health to {_MHP}
    remove 1 nether star named "&4Reroll Item" from player's inventory
    message "Set Health to %{_MHP}%"

command /rerollget:
  permission: op
  trigger:
    give player 1 of nether star named "&4Reroll Item"

[Moruto]

set {_MHP} to random integer between 8 and 20

just dont make it a random integer change it dont ask me to change it cause im not good with skript but i can understand it well

Edited October 11, 2022 by Moruto
mistake typin