BlowUpGroup objects have 2 variables - “Id” (the number determining the order of the object deletion) and “Detonator_id” (connecting the object to the detonator object). Detonator has just one variable, “Id”, which uniquely identifies the object. All 3 identifiers are set in the scene editor.
This condition:
links the BlowUpGroup objects to each Detonator object, so only those linked objects are checked against the detonator’s timer.