Creates a character string that serves as an alias for a numerical value.
So now, ef_lshutter is equivalent to 2 --
bg "test.bmp",ef_lshutter is equivalent to bg "test.bmp",2.
（Really Advanced Saikyo-ryuu）
It is possible to use numalias to create character string aliases for numerical variables.
now, %akari_love is identical to %0:
is the same as add %0,10.