from matplotlib.pyplot import figure, show, cm

from numpy import arange

from numpy.random import rand

def gbar(ax, x, y, width=0.5, bottom=0):

X = [[.6, .6], [.7, .7]]

for left, top in zip(x, y):

right = left + width

ax.imshow(X, interpolation='bicubic', cmap=cm.Blues,

extent=(left, right, bottom, top), alpha=1)

fig = figure()

xmin, xmax = xlim = 0, 10

ymin, ymax = ylim = 0, 1

ax = fig.add_subplot(111, xlim=xlim, ylim=ylim,

autoscale_on=False)

X = [[.6, .6], [.7, .7]]

ax.imshow(X, interpolation='bicubic', cmap=cm.copper,

extent=(xmin, xmax, ymin, ymax), alpha=1)

N = 10

x = arange(N) + 0.25

y = rand(N)

gbar(ax, x, y, width=0.7)

ax.set_aspect('auto')

show()