In every spin, all winning symbols including SCATTERS will remain on reels while non-winning symbols will disappear. All remaining symbols will fall to the bottom and a new set of symbols will be put in. If more and more same-family symbols have been added to an existing or new winning combination, these symbols along with SCATTERS will remain on reels for another cascading. When no symbol contributes to an existing or new winning combination, the cascading ends, and winnings are calculated.