What are the level codes for gravity grid

There are no codes for the 30 levels. But users can write new levels, which can be accessed by loading their codes, which must be on a single line. Some examples:
1.
code:0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,3,0,0,0,0,0,0,2,3,0,3,0,0,0,0,0,0,2,2,0,0,0,0,0,0,0,1,1,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0;0
2.
code:0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,3,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,1,2,0,0,0,0,0,0,0,2,3,0,0,0,0,0,0,0,2,4,4,0,0,0,0,0,0,1,3,4,0,0,0,0,0,0;2
3.
code:0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,7,0,0,7,0,0,7,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,5,0,0,5,0,0,5,0,0,6,0,0,6,0,0,6,0,0,4,0,0,4,0,0,4,0,1,1,1,3,3,3,2,2,2;1
4.
code:0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,6,0,0,0,0,0,0,0,0,6,0,0,0,0,0,0,0,1,1,2,0,0,0,0,0,1,2,2,6,5,5,5,0,0;2
5.
code:0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,7,7,0,0,0,0,0,3,2,3,3,0,0,0,0,1,2,1,1,7,0,0,0,0;3