'Forms' in the Bible

Who forms a god and casts an idol that will prove worthless?

A blacksmith works with his tool and forges metal over the coals. He forms it with hammers; he makes it with his strong arm. He gets hungry and loses his energy; he drinks no water and gets tired.

I am the one who forms light and creates darkness; the one who brings about peace and creates calamity. I am the Lord, who accomplishes all these things.