Нарисовать фигуру используя матрицу

from Tkinter import * 
root = Tk() 
canvas = Canvas(root, width=256, height=256)
square = canvas.create_rectangle(0,0,208,208,fill="green")
square = canvas.create_line(20,0,20,208,width=20,fill="blue")
canvas.pack()
 
root.mainloop()

#!/usr/bin/env python3
 
ROWS = 7
COLUMNS = 21
 
matrix = [ [ '*' for j in range(COLUMNS) ] for i in range(ROWS) ]
for i in range(1, ROWS - 1):
    for j in range(1, COLUMNS - 1):
        if i != (ROWS // 2) or j == 1 or j == (COLUMNS - 2):
            matrix[i][j] = ' '
 
for i in range(ROWS):
    for j in range(COLUMNS):
        print(matrix[i][j], end='')
    print()

from turtle import *
color('red', 'yellow')
begin_fill()
while True:
       forward(200)
       ieft(90)
       if abs(pos()) < 1:
              break
end_fill()
done()