chemisrty lab: elements and compounds

yesterday we did a lab in class and during this lab we had to fill up half a small plastic dish with water. We then had to put two alligator clips with two pieces of led on the ends of it, into the water. after a couple seconds the water turned purple on one side of the alligator clip, the oxygen side, and the on the other side the water turned a vanilla color, the hydrogen side. Both sides were bubbling, but the hydrogen side was bubbling more. Also during this lab we had to light a candle and put steel wool in the flame. When we did this sparks flew into the air and metallic little balls formed at the ends of the steel wool.