I am pretty new at SPSS macro's, but I think I need one. 

I have 400 variables, I want to do this loop 400 times. My variables are ordered consecutively. So first I want to do this loop for variables 1 to 4, then for variables 5 to 8, then for variables 9 to 12 and so on. 

```
vector TEQ5DBv=T0EQ5DNL to T4EQ5DNL.
loop #index = 1 to 4. 
+ IF( MISSING(TEQ5DBv(#index+1))) TEQ5DBv(#index+1) = TEQ5DBv(#index) . 
end loop. 
EXECUTE.

```