So, they’re all getting power cords together for... like... some plot reason.

It’s almost the end of the episode, and I don’t really remember anymore. 

They have four cords: two purple, a red, and a light-green.

…which then become a red, two blues, and a dark-green.

And then start to multiply as he puts them in, turning from 4 into… uh… at least 7?

…and multiply more, and more…

…and moooooore…

…and then the 4 become 12, because logic goes out the window when Hanna-Barbera makes a cartoon.