Простое передвижение "значка"

# -*- coding: utf-8 -*-
 
import os
import sys
import tty
import termios
 
 
def read_char():
    old_settings = termios.tcgetattr(fd)
    tty.setraw(sys.stdin.fileno())
    ch = sys.stdin.read(1)
    termios.tcsetattr(fd, termios.TCSADRAIN, old_settings)
    return ch
 
 
def print_line(l):
    _ = os.system("clear")
    for x in range(5):
        x *= 5
        print(''.join(l[x:x+5]))
 
 
def move_plus(n):
    where = line.index('+')
    line[where + n], line[where] = line[where], line[where + n]
    print_line(line)
 
fd = sys.stdin.fileno()
 
line = list('------------+------------')
print_line(line)
 
while True:
    c = read_char()
 
    if c == 'w':
        move_plus(-5)
    elif c == 's':
        move_plus(5)
    elif c == 'a':
        move_plus(-1)
    elif c == 'd':
        move_plus(1)
    else:
        sys.exit(0)

import os,sys
def curs():
    for i in range (len(matr)):
        if '+' in matr[i]:
            a,b=i,matr[i].index('+')
        print(''.join(matr[i]))
    cur=input()
    if cur=='d':
        matr[a][b],matr[a][b+1]=matr[a][b+1],matr[a][b]  
    elif cur=='a':
        matr[a][b],matr[a][b-1]=matr[a][b-1],matr[a][b]
    elif cur=='w':
        matr[a][b],matr[a-1][b]=matr[a-1][b],matr[a][b]
    elif cur=='s':
        matr[a][b],matr[a+1][b]=matr[a+1][b],matr[a][b]
    else:
        sys.exit(0)
    os.system('cls') # для винды .для другой системы os.system('clear')
    curs()
       
matr=[['-','-','-','-','-'],['-','-','+','-','-'],['-','-','-','-','-']]
curs()