fire thorns effect?

[TriceratopsX]

So for one of the skills in my game I want to have a spell that surrounds the caster in flames causing fire damage to whatever enemies hit them with physical attacks with a slight chance to burn them, and at the same time causing the caster's physical attacks to deal fire damage and giving every physical attack a slight chance to burn the target.
All well and good on the ideas side, but I don't know how to implement it, so if anyone has any clue on how to make this possible I'd appreciate any help you might be willing to lend.
Thanks in advance!

 

[InBlast]

Using Yanfly's plugin, you can do this state. It's been a long time since the last JS state I made, but you definitely can.

 

[Trihan]

Replace the 4 with the ID of your fire element and 20 in dmg with whatever you want the base thorns damage to be. This requires Yanfly's Buffs & States Core if you don't have it already.

<Custom React Effect>
if (value > 0 && this.isPhysical()) {
  var dmg = THORNS DAMAGE;
  dmg *= user.elementRate(ID OF FIRE);
  user.gainHp(-1 * dmg);
  if (user.isDead()) {
    user.performCollapse();
  }
}
</Custom React Effect>

 

[TriceratopsX]

I don't know what I did wrong, but I did something wrong.

Spoiler: Images

As a general rule I try not to be a complete idiot, but sometimes I can't help it.
Help please?

 

[Trihan]

Where I've put THORNS DAMAGE you need to actually replace that with a number.

 

[TriceratopsX]

(Facepalm) Oh yeah duh, that make sense. Thank you~