Strength effect +1

I want to make an effect that while active gives me another effect during the day and gets stronger at noon and decreases until
6 pm. I want the player to gain +1 strength effect every second from 6 am to noon, and from noon onwards to lose -1
until 6 pm, where it will be at 0 intensity, and will remain at 0 until 6 am.

I did a procedure that checks if it's day when the ticket is activated, if it's day I check the time of day, if
If that's the time of day, I'll add +1 strength, but I don't know how to add another 1 strength taking into account
the previous number, and if it's a block of programming for each number it will be huge, because I want to add +1 strength to the
each second.

Does anyone know how I can do this without the procedure becoming huge?

NOTE: 6h = 0 ticks
     7h = 1000 ticks
     8h = 2000 ticks
     9 am = 3000 ticks
     10am = 4000 ticks
     11 am = 5,000 ticks
     Noon = 6000 ticks

NOTE: Sorry if my English is not very good, I'm using Google Translate