def fireworks(n: int) -> None: l = (n-1)//2 for i in range(l): a = l-i-1 print(' '*i + '\\' + ' '*a + '|' + ' '*a + '/') print('-'*n) for j in range(l): i = l-j-1 a = l-i-1 print(' '*i + '/' + ' '*a + '|' + ' '*a + '\\')