It only works when the yr sensor changes value

Configuration
1

Hi
I have a lamp that turns blue when the temperature is below 4 degrees, but it only works when the yr sensor changes value.
My idea is that when I get up, the light turns on and should turn blue if there is frost outside, it can be slippery on the road

2

Make an automation that turns the light blue when you turn on the switch for the light.

3

I have an automation that turns on the light, so it should also see if the temp is below 4 degrees.

    - alias: "Frostvejr"
      trigger:
         platform: numeric_state
        entity_id: sensor.vejr_temperature
        below: 4.0
      action:
        service: scene.turn_on
        entity_id: scene.frost_pa_vej

`scene
  - name: Frost på vej
    entities:
       light.spisebord:
         state: on
         brightness: 204
         rgb_color: [18,27,255]
4

Yes. ALso, fyi use </> button in the text editor to display yaml correctly. The way you posted it is unreadable if people were to help you debug issues.