[1.16.1] Do a method to an entity every x amount of ticks

[clearcut]

I have made an event that deals damage to a living entity.

How would I make it deal the damage every 10 ticks or half a second or until another condition is met?

Edited July 14, 2020 by clearcut

[clearcut]

			while(startingHealth - victim.getHealth() < flatDamageCap && (victim.getHealth() / maxHealth) > damagePercentageCap)
			{
				if((victim.ticksExisted - startingTime) % 10 == 0 ) 
				{
					//do damage
				}
			}

This is more or less how I wanted it to work. It would keep checking it the total damage dealth by the method reaches the flat damage cap or percentage damage cap and would only deal damage on the 10th tick

Edited July 14, 2020 by clearcut

[Draco18s]

You need to attach a Capability to the entity in question to hold the data about that entity (eg. starting time) and then create a LivingUpdateEvent handler to count ticks.