if y == screen_size[0] - 1 and x == screen_size[1] - 1:
char_before = stdscr.inch(y, x - 1)
stdscr.addch(y, x - 1, char, attr)
if y == screen_size[0] - 1 and x == screen_size[1] - 1:
char_before = stdscr.inch(y, x - 1)
stdscr.addch(y, x - 1, char, attr)