problem with mapping

Hello,

i've the follow mapping:

1.- AUFNR

1.- FFLL

1.1.- APLZL

1.2.- VOL

1.2.1.- VORNR

1.3.- RESB

1.3.1.- CANTIDAD

1.3.2.- MATERIAL

the segment FFLL come two times.

the segment VOL come four times (for each FFLL)

I need to map APLZL of first FFLL for first four VOL and second FFLL-APLZL for last four VOL

Now, the STATMENT is mapping with VOL segment (i need it repeat same times of VOL) and the value of APLZL is the same eight times

how can i do it?