Alternating flash between 2 partitions of WS2812 strip

I have an LED strip partitioned into two sections (see below) and would like to make them flash in an alternating fashion. Is there any way I can achieve this within ESPhome rather than triggering the light change from HA?

  - platform: fastled_clockless
    id: traffic1
    chipset: WS2812
    pin: GPIO13
    num_leds: 8
    rgb_order: GRB
    name: "Traffic Light Main"
    internal: false
    - automation:
        name: Meeting about to start
          - light.addressable_set:
              range_from: 4
              range_to: 7
              id: traffic1
              red: 100%
              green: 100%
              blue: 100%
          - delay: 100ms
          - light.addressable_set:
              id: traffic1
              range_from: 0
              range_to: 3
              red: 100%
              green: 0%
              blue: 0%