How to switch easily between 2 switches periodically

Configuration
1

HI,

Please let me ask how I would easiest switch between my 2 Pond pumps periodically. They can be switched off when temp is below 6 degrees, but I want one on always to prevent the pond from freezing completely .
Right now I have this automaton trigger me (have still to set them manually… soon to be changed by adding extra switches) when temperature changes to the threshold values:

  - alias: Vijverpomp mag uit
    id: 'Vijverpomp mag uit'
    trigger:
      platform: numeric_state
      entity_id: sensor.owm_temperature
      below: 6
      for:
        hours: 1
    condition:
      - condition: template
        value_template: >
          {{ 5 < states('sensor.owm_temperature')|float < 7 }}
      - condition: template
        value_template: >
          {{ is_state('input_boolean.notify_utility', 'on')}}
    action:
      service: notify.notify
      data_template:
        title: Vijverpomp mag uit
        message: >
          De vijverpompen {{'mogen uit' if states('sensor.owm_temperature')|float < 6 else 'moeten aan'}} 
          want het is {{ states('sensor.owm_temperature') }} graden.

  - alias: Vijverpomp moet aan
    id: 'Vijverpomp moet aan'
    trigger:
      platform: numeric_state
      entity_id: sensor.owm_temperature
      above: 6
#      for:
#        hours: 1
    condition:
      - condition: template
        value_template: >
          {{ 7 > states('sensor.owm_temperature')|float > 5 }}
      - condition: sun
        after: sunrise
  #      after_offset: '+00:00:00'
      - condition: template
        value_template: >
          {{ is_state('input_boolean.notify_utility', 'on')}}
    action:
      service: notify.notify
      data_template:
        title: Vijverpomp moet aan
        message: >
          De vijverpompen {{'mogen uit' if states('sensor.owm_temperature')|float < 6 else 'moeten aan'}} 
          want het is {{ states('sensor.owm_temperature') }} graden.

Been trying to make 1 out of these 2, but for reasons of extra triggers in the ‘Aan’ automation I didn’t do so just yet.

I now need to add an automation that periodically (lets say each day) cycles the 2 switches, left and right, under the condition they can be switched Off. (basically temp being below 6).

I might even add another power saving condition/automation when temp is below 0, the cycle period would double to day 1 pump left On, day 2 both pumps Off, day 3 pump right On, day 4 both pumps off, restart cycle.

Any thought how to approach this best?

thx!