Heal Over Time - How can I add ticks?

[Hyllok]

Hey everyone!

I’m trying to modify the NV_FIRSTAID skill to turn it into a Heal Over Time (HoT) skill, healing 2% of Max HP per second for 4 seconds. I attempted to use add_timer and skill_addtimerskill, but unfortunately, I wasn't able to get it working.

Could someone please help me understand how to make this work? Any guidance would be greatly appreciated!
 

case NV_FIRSTAID:
{
    int healAmount = (sd->status.max_hp * 2) / 100;
    status_heal(bl, healAmount, 0, 2);
    clif_skill_nodamage(src, *bl, NV_FIRSTAID, healAmount, true);
    clif_updatestatus(*sd, SP_HP);

    // Scheduling ticks
    for (int i = 1; i <= 3; i++) {
        skill_addtimerskill(src, tick + (i * 1000), bl->id, 0, 0, NV_FIRSTAID, skill_lv, 0, 2);
    }

    break;
}

 

[Sylfeyn]

This behavior seems similar to Geneticist's Hell Plant, which is a status that deals damage around the player every 0.3 seconds.
In status.cpp you can see in status_change_timer:

case SC_HELLS_PLANT:
	tick_time = status_get_sc_interval(type);
	val4 = tick - tick_time; // Remaining time
	break;

In status_change_timer_sub:
 

case SC_HELLS_PLANT:
	if( sce->val4 >= 0 ){
		skill_castend_damage_id( bl, bl, GN_HELLS_PLANT_ATK, sce->val1, tick, 0 );
	}
	break;

Might not be the best way but maybe you could create a status that handles the healing over time following that structure, and make the skill apply the status for 4 seconds?