#!/usr/bin/env python
# -*- coding: utf-8 -*-
import pygame
from pygame.locals import *
import sys
import time
import serial
 
SCREEN_SIZE = (1000, 240)
MAX_SPEED = 100
R = 15
Y = SCREEN_SIZE[1]/2

 
pygame.init()
screen = pygame.display.set_mode(SCREEN_SIZE)
pygame.display.set_caption(u"drawShapes")
ser = serial.Serial(3)
 
num = 0
x = SCREEN_SIZE[0]/2
v = 0
while True:
    num = int(ser.read(1))
    screen.fill((0,0,0))

    if num == 2 :
	v+=1
    elif num == 1 :
	v-=1
    if v <-MAX_SPEED:
	v = -MAX_SPEED
    elif v>MAX_SPEED:
	v = MAX_SPEED

    x+=v

    if x > SCREEN_SIZE[0] - R:
	v = -v
    elif x < 0 + R:
	v = -v




    # �}Œ`‚ð•`‰æ
    #pygame.draw.rect(screen, (255,255,0), Rect(10,10,300,200))     # ‰©‚Ì‹éŒ`
    pygame.draw.circle(screen, (0,255,0), (x,Y), R)          # �Ԃ̉~
    #pygame.draw.ellipse(screen, (255,0,255), (400,300,200,100))    # Ž‡‚̑ȉ~
    #pygame.draw.line(screen, (255,255,255), (0,0), (640,480))      # ”’‚¢�ü
    pygame.display.update()

    time.sleep(0.05)