codesnippet3.py

    for row in range(w): 
        for col in range(h):

            cx = 1.5*(row - 3*w/4)/(0.5*w)
            cy = 1.0*(col - h/2)/(0.5*h)

            c = complex(cx, cy)
            x = complex(0, 0)

            for i in range(iterations):
                if abs(x) > 4: break
                x = x**2 + c

            color = (i << 21) + (i << 10)  + i * 8
            pixels[row,col] = color