100 wc. A Christmas adventure

Sammy couldn't sleep. Neither could Jo. "Fancy an adventure?" asked Sammy. "Of course" said Jo. So they sneaked out of the small flat and continued down the stairs. But the stairs went on for ages. Eventually they came to this room filled with paint pots. There was an easel with a canvas. Suddendly they heard a loud voice. It said: "You must paint a picture of matter itself!". They had a long discussion about what matter is and what it isn't. When they figured out what matter is, splashed all the paint onto the canvas.They had completed the task.