Disclaimer: I don't own anything but the plot.
Bridge Between the Times
Two boys stare at themselves through the same mirror in the same room. Both are on the brink of manhood; they would be graduating this year. Neither one saw the other; one is but a memory of the past. He has long since left these halls of learning.
Both boys have just dressed in their finest robes; bottle green that covers them loosely, and barely touches the ground. None of their friends say much, they are all thinking about the girls they are taking to the Christmas ball. Many have experimented with new spells for their hair, and a couple even tried Muggle products to get the desired result.
Both boys look behind themselves in the mirror to each see their best friend randomly picking up objects and zooming them around the room with their wand. Two short fat boys with limited magical ability each watch this haphazard release of nerves with awe.
Slowly the dorm empties, as one by one everyone from both times leaves to meet their dates in the common room.
The two boys take one last look at their reflection, sweep their hair out of their eyes, and walk slowly down the stairs. They sit down in the same chair to wait.
Two girls walk down a different flight of stairs. The boys gasp at their astonishing beauty. Both girls seem to have transformed their unruly red hair into perfect waves that cascade around their pretty faces. Their light blue dress robes cascade down the steps behind them, and gracefully hug their bodies.
Both girls smile happily as the boys offer their arms. And as Harry leads Ginny out the portrait hole, the bridge between the times breaks. Lily and James flicker, and disappear.
A/N I'm sorry if this was confusing, please review to let me know if you didn't understand parts of it.