That is actually not a snippet. It is just a screenshot.
Right now you have two sources going that From DDT blue bullet at the top. One from the "x 9" and the other from the compound Add.
Get rid of that From DDT blue bullet at the top.
The drop a feedback node.
Wire from the compound Add to the feedback node. Go from the output of the feedback node to something that will actually be a sink for that wire. That means an input into another node.
I would recommend looking at the online LabVIEW tutorials
LabVIEW Introduction Course - Three Hours
Learn LabVIEW
