import tkinter
import random
canvas=tkinter.Canvas(width=640, height=480, bg='green')
canvas.pack()

riadkov=48
cesta=[270]*riadkov

def kresli_cestu():
    canvas.delete('cesta')
    for i in range(riadkov):
        canvas.create_rectangle(cesta[i],i*10,cesta[i]+100,i*10+10, fill='white', outline='', tags='cesta')


def kresli_auto():
    canvas.delete('auto')
    canvas.create_rectangle(autox,autoy,autox+10,autoy+10, fill='red', tags='auto')

def vlavo(klaves):
    global autox
    autox-=10

def vpravo(klave):
    global autox
    autox+=10

def animacia():
    posun_cestu()
    kresli_cestu()
    kresli_auto()
    canvas.after(100, animacia)

def posun_cestu():
    novy=cesta[0]+random.randrange(-1,2)*10
    if novy<0:
        novy=0
    if novy>540:
        novy=540
    cesta.insert(0, novy)
    cesta.pop()



kresli_cestu()
autox=320
autoy=460

kresli_auto()
animacia()
canvas.bind_all('<Left>',vlavo)
canvas.bind_all('<Right>',vpravo)