An interaction between an old person and a young person

The last remaining droplets of the rain fell silently and a rainbow was formed not far away from where the old man sat, staring blindly into the sky. He could hear the children screaming in the playground, pedestrians walking along the footpath and recognised a few familiar voices around him.
The old man inhaled a lungful of air and found a soothing sense of comfort in it, remembering the long lost afternoons in his youthful years when he took pleasure in watching the birds fly high in the sky. Somewhere in his forgotten past he was able to see the world around him with his sky blue eyes. He remembered the time when he took advantage of this God given gift and he began to feel the loss and sorrow even more.
His hearing sharpened as he heard a young voice calling out his name. It was his own grandson who ran eagerly towards the worn out bench where his grandfather sat, wearing...