Complex sentence: Huan placed a giant white canvas on the floor of the exhibition space, then stepped out of the exhibition area and had a jar of red liquid (supposed to represent blood) and mangled doll parts poured over him.
Split into simpler sentences: Huan placed a giant white canvas on the floor of the exhibition space. Huan then stepped out of the exhibition area and had a jar of red liquid (supposed to represent blood) and mangled doll parts poured over him.