for indice, color in enumerate(colores):
    dy = 30 + indice * 23 - 170
    pizarra.rectangulo(0, dy, 20, 20, getattr(pilas.colores, color), relleno=True)
    pizarra.rectangulo(0, dy, 20, 20, color=pilas.colores.negro)
    pizarra.texto(color, 30, dy - 15)