To attach GlowBugs to CodeBug, attach a crocclip from GND on CodeBug to GND on the left side of the GlowBug, repeat this for PWR from CodeBug to the 5V on the left side of the GlowBug. Then connect a crocclip from leg 3 on CodeBug to the DATA IN leg on the GlowBug. You can connect more GlowBugs to the chain by connecting the right side of the previous GlowBug to the left side of the next GlowBug, as shown in the picture below.