First - stop being so hard on yourself - we have all done this or something worse. After you have had a moment, you will realize this will not be a mistake but an opportunity to add a design element! It is a santa quilt, so, are they in spots to add small ornaments? a small wrapped christmas package? a peppermint candy applique? or even place a few stars in the same color as your center pieces of the log? If you scatter a few of these things around, everyone will think it is part of your design and will be amazed !!!!!