Welcome NOOB!
Do the script yourself, we'll give the hints:
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Unit domove getpos fire1
Unit playMove "PutDown" //or "CombatToPutDown"
fire1 inflame true
Killer Dofire Unit
Killler doMove getpos fire1
Killer playmove "PutDown"
fire1 inflame false
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Don't forget the timing between each command!
Use conditions:
@Unit distance fire1 <= 1
Use time gaps:
~3
And you'll have a nice beginer script. ;D