b$="---+---+---
   |   |   
"
a$=" X |   |   
"+b$+b$
?a$
f(30,0)
f(58,9)
f(10,0)
f(50,9)
f(54,0)
f(26,9)
sub f(x,y)mid$(a$,x)=chr$(79+y):?a$end sub