4x4x4 LED cube

Step 3 Solder all positives together

Now that you have 4 seperate layers, take one of them and insert it back into the template. Now with the positive leads sticking straight up, get another layer and place it on top of the one in the template. Connect the two together by soldering the positives together in a column. Do not solder anything to the negatives you have already soldered together. Repeat this process for the remainder of the layers until you have the cube built.