Udf from fixed values

I need help for the following logic from fixed values
.Nothing comes from source. Only I need to check E1EDK01.BSART =EC

Fixed values

key    values
0      standard
1     (1)general terms and conditions ....
2      (2)TestTestTestTestTestTestTestTest
like this up to entries

16                 (16)Test1Test1Test1Test1Test1Test1
default%          error

Target
Notes 
ID     0.1
Text   1..1

Logic
If E1EDK01.BSART =EC  then

(do ((i 0 (+ i 1))) ((>= i 17))
        constant ST >notes.id
       concatenate all values from fixed values to Notes.Text

Thanks or your help