colormode(HSB)

class Icon(object):
    def __init__(self):
        self.width = 5
        self.height = 5
        self.pixels = [random(2) \
           for i in xrange(self.width * self.height)]
        self._symmetrize()
        self.pixelsize = 8
        self.fg_col = (random(1.0), random(0.4, 1.0), 0.25)
        self.bg_col = ((self.fg_col[0] + 0.2) % 1.0, self.fg_col[1], 1.0)

    def paint(self, x_pos=0, y_pos=0):
        nostroke()
        for y in xrange(self.height):
            for x in xrange(self.width):
                if self.pixels[x + self.width * y]:
                    col = self.fg_col
                else:
                    col = self.bg_col
                fill(color(col))
                rect(x * self.pixelsize + x_pos, y * self.pixelsize + y_pos,
                   self.pixelsize, self.pixelsize)

    def _symmetrize(self):
        for y in xrange(self.height):
            for x in xrange(int(self.width / 2), self.width):
                self.pixels[x + self.width * y] = \
                   self.pixels[(self.width - (x + 1)) + self.width * y]


class IconGrid(object):
    def __init__(self, width, height):
        self.width = width
        self.height = height
        self.icons = [Icon() for x in xrange(self.width) \
           for y in xrange(self.height)]
    
    def paint(self):
        for y in xrange(self.height):
            for x in xrange(self.width):
                icon = self.icons[x + y * self.width]
                pw = icon.width * (icon.pixelsize + 1)
                ph = icon.height * (icon.pixelsize + 1)
                icon.paint(x * pw, y * ph)

grid = IconGrid(8, 13)
grid.paint()

http://dev.soup.io/post/281433

See link for screenshot

prototype for auto-generated soup user icons

Python