Coolant warning light circuit

[st...@thatbytes.co.uk]

So I'm adding a coolant warning light to my Defender and the coolant switch is closed when the coolant is full and open when the coolant is empty.

I wanted the warning light to come on when powered and then go off after a period (a few seconds). I designed this circuit using the minimum components but just wondering if there was a simpler / better solution.