Write a program that produces an ASCII art representation of an hourglass using nested for loops. Use a class constant to make it possible to change the height of the hourglass. Output when a class constant named SIZE is set to a value of 2:

||
\ /
\ /
||
/::\
/\
||

Output when a class constant named SIZE is set to a value of 3:

||
\ /
\ /
\ /
||
/::\
/\
/\
||

Output when a class constant named SIZE is set to a value of 4:

||
\ /
\ /
\ /
\ /
||
/::\
/\
/\
/\
||