A simple bash GUI, you can draw lines,boxes,write characters in your bash command line.
Maybe you can write a simple game using this framework!
board_init;
board_random;
board_flush;
board_init;
board_black;
draw_line 2 0 100 $bwhite;
board_flush;
board_init;
board_black;
draw_broken_line 2 0 100 $bwhite;
board_flush;