Maze Pattern Building in Python

Hello I am a newbie to python and using python 3. I wish to learn patterns and printing e.g stars etc. I want to make maze pattern but i confused to make maze no 2-no4

No 1

    @ @@@@@@@@@@@@@
    @             @
    @@@@@@@@@@@@@ @
    @             @
    @ @@@@@@@@@@@@@
    @             @
    @@@@@@@@@@@@@ @
    @             @
    @ @@@@@@@@@@@@@
    @             @
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    @             @
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    @             @
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No 2

    @ @@@@@@@@@@@@@
    @ @   @   @   @
    @ @ @ @ @ @ @@@
    @ @ @ @ @ @   @
    @ @ @ @ @ @@@ @
    @ @ @ @ @     @
    @ @ @ @ @@@@@@@
    @ @ @ @       @
    @ @ @ @@@@@@@ @
    @ @ @         @
    @ @ @@@@@@@@@@@
    @ @           @
    @ @@@@@@@@@@@ @
    @             @
    @@@@@@@@@@@@@@@

No 3 

    @ @@@@@@@@@@@@@
    @ @           @
    @ @ @@@@@@@@@ @
    @ @ @       @ @
    @ @ @ @@@@@ @ @
    @ @ @ @   @ @ @
    @ @ @ @ @ @ @ @
    @ @ @ @ @ @ @ @
    @ @ @ @@@ @ @ @
    @ @ @     @ @ @
    @ @ @@@@@@@ @ @
    @ @         @ @
    @ @@@@@@@@@@@ @
    @             @
    @@@@@@@@@@@@@@@

No 4 

    @ @@@@@@@@@@@@@
    @ @           @
    @ @ @@@@@@@@@ @
    @ @ @       @ @
    @ @ @ @@@@@ @ @
    @ @ @ @   @ @ @
    @ @ @ @ @ @ @ @
    @ @ @ @ @ @ @ @
    @ @ @ @ @ @ @ @
    @ @ @   @ @ @ @
    @ @ @@@@@ @ @ @
    @ @       @ @ @
    @ @@@@@@@@@ @ @
    @           @ @
    @@@@@@@@@@@@@ @

This is my code maze no1:

def SimpleMaze(S):
    bool=1
    for i in range(S):
        if (i+1)%2==0:
            print('@'+' '*(S-2)+'@')
        else:
            if bool==1:
                print('@'+' '+'@'*(S-2))
            else:
                print('@'*(S-2)+' '+'@')
            bool=not bool
S= input("Nilai S:")
SimpleMaze(int(S))