Assuming you've saved it as a SC in the map editor (if not do that first), you can do
DIM MAP[0]
FOR I=0 to 3
LOAD "SC_MAPNAME_L"+STR$(I),FALSE,MAP
BGLOAD I,MAP
NEXT
I might have screwed up with the loading syntax, but you get the idea, right?
0そうだね プレイ済み