click on a block to change it to either a battery, a light or a wire when a wire touches the red charge on a battery, it'll turn red. when a wire touches the red charge on a battery, it'll turn blue. wires touching other wires will turn into that colour too, picking up the positive or negative charge. they can only go back to neutral if all the other wires touching them are neutral, or simply not there a light will only light up if it's connected to both a positive and negative charge
red = positive blue = negative grey = off light yellow = on light white = neutral wire
