You might want to create a macro to loop a certain number of times. For example, this macro will delete the first line, go down five lines and delete the next, etc for 200 runs.
For i = 1 To 100
Selection.MoveDown Unit:=wdLine, Count:=1, Extend:=wdExtend
Selection.Delete Unit:=wdCharacter, Count:=1
Selection.MoveDown Unit:=wdLine, Count:=5
Next i
Just create the macro you want and put it between the loop statement. Make sure you don't have blank lines, etc.