for i in range(4):
i += 1
for j in range(i):
print('*', end='')#end=‘'输出空格
print()
for i in range(6):
for j in range(0,5-i): #打印空格
print(' ',end="")
for k in range(0,2*i+1)
if k%2!=0: #判断下标的奇偶性
print(' ',end='') #奇数打印空格
else:
print('*',end='') #偶数打印✳
print()
for i in range(4):
print("*"*(i+1))