# Tk_speedy_car.py

# Tk_speedy_car.py

import Tkinter
from PIL import ImageGrab
import random
root=Tkinter.Tk()
ww=root.winfo_screenwidth()
hh=root.winfo_screenheight()
root.geometry(str(ww+10)+"x"+str(hh+10)+"+-10+-32") # to hide the frame
canvas=Tkinter.Canvas(width=ww, height=hh, bg='green')
canvas.pack()

momentum = 0

carbox=10
road=[ww/2-50]*(hh/carbox)

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

def draw_car():
    canvas.delete('car')
    c='black'
    bbox = ImageGrab.grab([carx-3,cary+7,carx+10,cary+8])
    t=[bbox.getpixel((0, 0)), bbox.getpixel((12, 0))]
    if (0,255,0) in t:
        c='red'
    canvas.create_rectangle(carx,cary,carx+10,cary+16, fill=c, tags='car')

def veer_left(z):
    global carx
    carx-=10

def veer_right(z):
    global carx
    carx+=10

def animate():
    apply_road()
    draw_road()
    draw_car()
    canvas.after(3, animate)

def apply_road():
    global momentum
    momentum=min(8,max(-8,momentum))
    if road[0]+momentum<500:
        momentum+=0.075
        roadside=road[0]+momentum
    elif road[0]+momentum>ww-600:
        momentum-=0.075
        roadside=road[0]+momentum
    else:
        momentum+=random.choice([-0.1,0.1,-0.2,0.2,-0.25,0.25])
        roadside=road[0]+momentum
    road.insert(0, roadside)
    road.pop()

draw_road()
carx=ww/2-5
cary=hh-100

draw_car()
animate()
canvas.bind_all('<Left>',veer_left)
canvas.bind_all('<Right>',veer_right)