Series and parallel circuits

Series: a circuit in which resistors are arranged the same, so that the current only has one path to take.
Equation: R(total)=R1+R2...
Parallel: a circuit in which resistors are arranged with their heads connected together and their tails connected together. 
Equation: 1/R(total) = 1/R1+1/R2... 

The picture above, although it may not be an original picture, I feel like it ideally depicts exactly what a series diagram is because it shows the pathway that the current flows on. It also shows that as the energy flows to each lightbulb, each one of them get dimmer as the current goes on. 

I know it may be hard to understand exactly what is going on in this picture, considering how small my TV is and how far away it is from the light, but the point of this picture is to show you how parallel circuits work. Without parallel circuits, my TV being on along with the light in my room at the same time would not be as bright as they are in this picture. This is because with the parallel circuits, current has more than one way it can flow, making it easier for the power to get to more than one thing at once. Thus making it possible for both my TV and light to be on at the same time without either one being inefficient or dim.