The following picture gives information about a simple circuit with light. According to the picture we can see, there is a battery on the right side of the picture, which has both the positive and the negative sides.
Followed by that, there is a light bulb on the left side of the picture. According to the information we can get from the picture, the negative side of the battery is connected to the light bulb with wire following along the red arrows.
It is clear that the light bulb is connected to the positive side of the battery with wires following along the red arrows again. And this light bulb is powered by the battery.
In general, this picture is about a simple circuit with light, and if we want to make it more efficient, we can add a switch there.