general structure of expression: multiplier * line + shift

#================#      drawLine()
pseudocode:
   print #
   print some number of =s
   print #
   println
   
SIZE           ='s
3              12
4              16
generalized    4 * SIZE

----------------------------------------

|      <><>      |      drawTopHalf()
|    <>....<>    |
|  <>........<>  |
|<>............<>|

pseudocode: 
for (4 lines):
   print |
   print some number of spaces (dependant on which line)
   print <>
   print some number of dots (dependant on which line)
   print <>
   print some number of spaces (dependant on which line)
   print |
   println

--SIZE 4:--
line        spaces         -2 * line         -2 * line + 8
1           6              -2                6
2           4              -4                4
3           2              -6                2
4           0              -8                0

--SIZE 4:--
line        dots           4 * line          4 * line - 4
1           0              4                 0
2           4              8                 4
3           8              12                8
4           12             16                12

SIZE        dots                       spaces
3           -2 * line + 6              4 * line - 4
4           -2 * line + 8              4 * line - 4
generalized -2 * line + 2 * SIZE       4 * line - 4 (no change)