. . ..........^
. . ........./ | \
. . .........| | |
. . .........| | |
. . .........| | |
. . .........| | |
. . .........| | |
. . .........| | |
. . .........| | |
. . .........| | |
. . .........| | |
< ___________>
. . .........|X|
. . .........|X|
. . .........|X|
. . .........|X|
. . .........@