rewriting flatten and sequence
rewriting flatten and sequence

hoanganh6491/BrightFutures,hoanganh6491/BrightFutures,Thomvis/BrightFutures,zenkimoto/BrightFutures,zhaar/BrightFutures,morizotter/BrightFutures,MattesGroeger/BrightFutures,zhaar/BrightFutures,Noobish1/BrightFutures,tranhieutt/BrightFutures,MattesGroeger/BrightFutures,Thomvis/BrightFutures,Noobish1/BrightFutures,morizotter/BrightFutures,tranhieutt/BrightFutures,zenkimoto/BrightFutures