as someone noticed, there is a little mistake in the demo mission i released with the script as the init field said
this addaction ["Blow bomb (30 sec)", "arm.sqs"]
and that's wrong because arm.sqs was the original name of the script that i changed just before uploading it here with blowbomb.sqs, but in the mission i did not... sorry...
to fix the bug, just type:
this addaction ["Blow bomb (30 sec)", "blowbomb.sqs"]
sorry :-\ ;D
nt3n