Delay in automation not working - what did I do wrong?

[der-optimist]

I think this topic is already discussed here:

Automation Delay template convert seconds to HH:MM:SS format

For a random delay in an automation I am using the following template: {{ range(5, 25)|random|multiply(60) }} This gives me this error: delay template: offset 2100.0 should be format 'HH:MM' or 'HH:MM:SS' What function could I use to change seconds to HH:MM:SS ?