Can be Command Block(CMB)

it can run console commands

when you put it,then it popups the message type a command that you want to run,then type a command

than click the done button,put it a wire of metl,pscn or nscn and sprk to make and it run the command!!!

Can be useful for start buttons instead of using the console(in a save)for making pixels in x and y commands too and to change the temp of an element!!!