Untitled

import math


height = 7
width = 21
nosik = '.|.'
dash = '-'

center_line = math.ceil(height / 2)+1
middle_dashes = int((width - len('WELCOME'))/2)

for i in range(1, height+1, 2):

    if i > center_line:
        print(dash * middle_dashes, 'WELCOME', dash * middle_dashes)
    else:
        dash_count_one_side = int((width - i*len(nosik)) / 2)
        nosiki_in_line = str(i * nosik)
        print(dash * dash_count_one_side,
              nosiki_in_line, dash * dash_count_one_side)

for i in range(center_line, 0, -2):
    dash_count_one_side = int((width - i*len(nosik)) / 2)
    nosiki_in_line = str(i * nosik)
    print(dash * dash_count_one_side,
          nosiki_in_line, dash * dash_count_one_side)