Change RGB LED based on thermostat temperature esphome

[paper scarab]

I have a working RGB LED strip plugged into a esphome. I would like to change it's color based on the temperature of a thermostat. Not sure where to start.

[dire hamlet]

By describing in text exactly what you want. That's not only useful for us but also for yourself.

[swift perch]

You shold create an Automation that is based on the State of the Thermostat Temperature. When the state changes your automation runs an action to change the color of the LED.

[paper scarab]

alias: gagitest
description: ""
triggers:
  - trigger: state
    entity_id:
      - sensor.current_temperature_3
conditions:
  - condition: state
    entity_id: climate.homekit_controller
    state: heat
actions:
  - variables:
      gaggitemp: "{{int(states('sensor.current_temperature_3'))}}"
  - action: light.turn_on
    metadata: {}
    data:
      rgb_color:
        - "{{ gaggitemp*2 }}"
        - 0
        - "{{ 255 - gaggitemp*2 }}"
    target:
      entity_id: light.esphome_web_rgb_led_strip
  - delay:
      hours: 0
      minutes: 0
      seconds: 1
      milliseconds: 0
mode: single

ok i got something that mostly works, but not sure how to do better colors, should go from a blueish purple to bright red over the temperature range i am looking at

it does some kind of pulse everytime it updates though even if it isn't changing the color. so every second i get a little flicker as if it was turning off and then setting the new color