import tkinter as tk
import time
import random

root = tk.Tk()
W = 800
H = 600
g = print("%dx%d",(W,H))
root.geometry(g)
canvas = tk.Canvas(root)
canvas.pack()
canvas.config(width = W, height = H)
root.title("List of Things")

class Thing:
	def __init__(self,x,y):
		self.position_x = x
		self.position_y = y
		s = random.randint(0,1)
		if (s == 0):
			self.shape = "square"
		if (s == 1):
			self.shape = "circle"

	def move(self):
		self.position_x += random.randint(-5,5)
		self.position_y += random.randint(-5,5)

	def draw(self):
		x = self.position_x
		y = self.position_y
		if (self.shape == "square"):
			canvas.create_rectangle([x,y,x+50,y+50],fill="green")
		if (self.shape == "circle"):
			canvas.create_oval([x,y,x+50,y+50],fill="purple")


list_of_things = []
for y in range(1,11):
	list_of_things.append( Thing(W/2, y*25)  )

while True:
	canvas.delete("all")

	for i in range(len(list_of_things)):
		list_of_things[i].move()
		list_of_things[i].draw()

	canvas.update()
	time.sleep(0.01)

root.destroy()