像是这样:
----------------------------- | \space\space\space\space\space\space\space\space\space\space\space\space\space\space 黑线>| \space\space\space | | \space\space\space\space\space\space\space\space\space\space\space\space\space\space 黑线>| \space\space\space | | \space\space\space\space\space\space\space\space\space\space\space\space\space\space 黑线>| \space\space\space | | \space\space\space\space\space\space\space\space\space\space\space\space\space\space 黑线>| \space\space\space | | \space\space\space\space\space\space\space\space\space\space\space\space\space\space 黑线>| \space\space\space | -----------------------------
(要不又要被我妈揍了(小声))