laços

https://www.google.com.br/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&ved=0CDIQtwIwAA&url=http%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3DeCSCLQZkjjs&ei=PIJlUqu4LMGj2QWe5oDAAQ&usg=AFQjCNELVboqfPCp4UOZlTvinbm9GNXkIg&sig2=V04Bg_SkRzDQe0SciO0igw