Once upon a time many years ago, a dot was born in the space at the origin and began moving forward in the time tracing a line. After sometime, another dot was born and began moving forward tracing a line like the another dot. Their traces were sloped, not parallel. So as the time passed, the lines traced by the dots began converging towards each other. Then they met and coalesced at a point to become one. No one could discern that these were two lines overlapping each other except on a close examination.
For long years, they travelled forward more or less as a single line with some kinks here and there. Sometimes one colour and sometimes the other colour line was visible. A time came, not suddenly but gradually, they began drifting apart from one another and separated moderately from one another. After sometime they became parallel to each other. As we know, two parallel lines however close are destined never to meet one another. How long this will continue because sometimes or the other one of the dots will stop moving and vanish from the screen. Another lonely dot will continue for the time stipulated by the almighty for it and then there will be no lines. Story will come to an end.