There are some methods to create map and I've shown you the simplest way, to use only BGFILL and BGPUT. Please see help documents for the detail of these commands.
Try typing the following commands in direct mode.
BGFILL 0,0,0,24,14,107
BGFILL 0,1,1,23,13,103
BGPUT 0,12,7,241
0そうだね 未プレイ