Half A Hour For Miracles(1968)

Original title: Полчаса на чудеса

The boy Fedya met mysterious The Wall Painter, who gave him his magic brush, with which anybody could do good deeds. But only for a half of hour. The agents of the evil king - The Gray and Abricadabr - hunt for boy. They want to destroy the magic brush and cancel all good deeds in the world