this could be next...

1.3.2..1.3.2..1.3.2..1.3.2..
2.4.3..4.1.4..2.4.3..4.1.4..  for each the sum is fifteen.

1 2 3 4
2 3 1 4
3 1 2 4 there is a sum of thirty

1 2 3 4
2 3 1 4
3 1 2 4
1 2 3 4  and so then it's this simple

my name is walter.