To draw door mat

 

n=int(input("Enter number of lines:"))

n3=int(n*3)

for i in range(n//2):

   pat=".|."*(2*i+1)

   print(pat.center(n3,"-"))

   

print("WELCOME".center(n3,"-"))

for i in range(n//2-1,-1,-1):

   pat=".|."*(2*i+1)

   print(pat.center(n3,"-"))