''' Purpose: produce color palettes
'''


def create( ) :
    ''' Returns a list of different-sized palettes
    '''

    B = [ (0,0,0) ]

    BW = B + [ (255,255,255) ]

    BWRGB = BW + [ (0,255,0), (0,0,255), (255,0,0) ]

    BWRGBMCY = BWRGB + [ (255,255,0), (255,0,255), (0,255,255) ]

    values= [ 0, 255, 128, 64, 32, 16, 8, 4, 2, 1] 

    palettes = [ B, BW, BWRGB, BWRGBMCY ]

    for i in range( 2, len( values ) ) :
        p = []
        for x in range( 0, i+1 ) :
            r = values[ x ]
            for y in range( 0, i+1 ) :
                g = values[ y ]
                for z in range( 0, i+1 ) :
                    b = values[ z ]
                    rgb = ( r, g, b )
                    p.append( rgb )
        palettes.append( p )

    return palettes[ 0 : 6 ]