Complex sentence: On July 2nd, at 6 a.m. WSCQ begin stunting by simulcasting sister stations WVOC and WLTY until 4 p.m., replaced by the sound of a ticking clock that lasted for an hour.
Split into simpler sentences: On July 2nd, WSCQ begin stunting by simulcasting sister stations WVOC and WLTY for most of the day. At 4 p.m. that afternoon, the simulcasting was replaced by a ticking clock SFX that lasted for an hour.