Everlasting flame

You create a flame, no larger than a square inch in size, on or inside an object you touch. This flame lasts for 1 day, or until you use a bonus action to dispel it. The flame can be of any color of your choosing, and it is warm, but doesn't provide enough warmth to keep someone warm. If you cast this spell on the same object each day for a year, this spells effects on that object become permanent, until the object is destroyed.