black = color(0)
white = color(255)

def setup():
    size(320, 240)
    # frameRate(30) # 60 by default


def draw():
    loadPixels()
    for i in range(len(pixels)):
        if random(1) < 0.5:
            pixels[i] = black
        else:
            pixels[i] = white

    updatePixels()
    fill(0, 128)
    rect(0, 0, 60, 20)
    fill(255)
    text(frameRate, 5, 15)