First Automation newbie

[rotund kettle]

Hello, trying to turn on a relay every 2 hours for 30 seconds then turn off. This automation must run from 10am till 6pm
Sometimes relay don't stop ...

Here is my code:
alias: Acqua al camaleonte
description: ""
trigger:

• platform: time_pattern
  hours: /2
• platform: time
  at: "10:01:00"
  condition:
• condition: time
  before: "18:00:00"
  after: "10:00:00"
  action:
• type: turn_on
  device_id: 2560f61772977dee91aa505dea18d7c3
  entity_id: c6a095e56146230eeb2e83419b128607
  domain: switch
• delay:
  hours: 0
  minutes: 0
  seconds: 30
  milliseconds: 0
• type: turn_off
  device_id: 2560f61772977dee91aa505dea18d7c3
  entity_id: c6a095e56146230eeb2e83419b128607
  domain: switch
  mode: single

What's wrong?

The realy Is connected to ESP32. Just added configuration file

[heady talon]

To format your text as code, enter three backticks on the first line, press Enter for a new line, paste your code, press Enter again for another new line, and lastly three more backticks.
```yaml
example: here
```
Don't forget you can edit your post rather than repeatedly posting the same thing.