Traversing a two Dimensional Array

Question

Hi,
Need code to traverse through a two dimensional array as follows:
1    2     3   4  5
6    7     8   9 10
11 12 13 14  15
16 17 18 19 20
Required result: 1,2,3,4,5,10,15,20,19,18,17,16,11,6,7,8,9,14,13,12.