Animated background with waves

import math
from pymt import *
from OpenGL.GL import *


class Background(MTWidget):
    def __init__(self):
        super(Background, self).__init__()
        self.background = Image('background.jpg')

    def draw(self):
        w = getWindow()
        w.gradient = False
        set_color(1, 1, 1)
        drawTexturedRectangle(self.background.texture, size=w.size)

        h2 = w.height / 2.
        l = []
        l2 = []
        t = getClock().get_time()
        for x in xrange(0, w.width + 50, 50):
            l.append(x)
            l.append(h2 - 120 + math.sin(x * 0.01 + t * 0.3) * 30)
            l.append(x)
            l.append(h2 + 120 + math.sin(0.01 + x * 0.01 + t * 0.15) * 30)
            l2.append(x)
            l2.append(h2 - 200 + math.cos(x * 0.01 - t * 0.2) * 30)
            l2.append(x)
            l2.append(h2 + 140 + math.cos(0.01 + x * 0.01 - t * 0.3) * 30)
        set_color(65 / 255., 123 / 255., 161 / 255., .2)
        drawPolygon(l, style=GL_TRIANGLE_STRIP)
        drawPolygon(l2, style=GL_TRIANGLE_STRIP)

if __name__ == '__main__':
  runTouchApp(Background())