Pseudo Health? Help needed with player slowly losing health

[Godatbedwars]

i have the picture let me post them rq
i made it simple and used a repeater although i hate using them but i want you to understand

Step 1

items needed

Step 2

wires

then

for the trigger

Step 3

idevice settings

Step 4

idevice settings
NOW YOUR DONE YAY