import numpy as np

from lets_plot import *
LetsPlot.setup_html()

arr = np.array([
            [[150, 0, 0, 255], [0, 150, 0, 255]],
            [[0, 0, 150, 255], [150, 150, 0, 255]]
        ])

p = ggplot() + geom_imshow(arr) + ggsize(300, 200)
p