Time trigger variable for choosing actions

Configuration
1

I’m not sure if I’m using the correct terminology, but I want to make an automation that defines a few loops for my lights to gradually change over a span of time.

Change 3 starts at 23:00 and gradually dims the lights over a span of 60 minutes to 2200K and 10% brightness

Change 2 starts at 20:00 and gradually dims the lights over a span of 180minutes to 2600K and 20% brightness

Change 1 starts at 16:00 and gradually dims the lights over a span of 240 minutes to 3000K and 30% brightness

Now how I’d like to use the automation, is when I get home before Change 1 starts, it reaches the target brightness+temperature in a duration that is calculated by: time I get home - 16:00

If I get home at a specific time, it should find the next Change that would happen, and change the lights accordingly.

So for example, if I get home at 17:30, it should gradually change the lights by:

variables:
  duration: "{{ next_change_start - current time }}" #current time has to be defined
  current_bright: "{{ state_attr(target_light, 'brightness') | default(255) }}"
  current_kelvin: "{{ state_attr(target_light, 'kelvin') | default(3500) }}"
  target_bright: "{{ next_change_target_bright }}"
  target_kelvin: "{{ next_change_target_kelvin }}" 
  intervals: "{{ duration * 12 }}"

Then it changes the lights temperature and brightness every Interval and activates the next change at the relevant start time.

Is this possible for a newbie?

2

Unless you really need some sort of fancy non-linear transition, don’t use loops. Simply use the transition parameter on the light.turn_on action. That way you don’t even have to bother with what the current values are.

3

Thanks, but my lights don’t support transitions