_tkinter.TclError: unknown option "-heigth"

from tkinter import *
import random
import time
 
class Ball:
    def _init_(self,canvas,color):
        self.canvas = canvas
        self.id= canvas.create_oval(10, 10, 25, 25, fill=color)
        self.canvas.move(self.id, 245, 100)
        starts = [-3, -2, -1, 1, 2, 3]
        random.shuffle(starts)
        self.x = starts[0]
        self.y = -3
        self.canvas_height = self.canvas.winfo_height()
        self.canvas_width = self.canvas.winfo_width()
        
 
    def draw(self):
        self.canvas.move(self.id, self.x, self.y)
        pos = self.canvas.coords(self.id)
        if pos[1] <= 0:
            self.y = 3
        if pos[3] >= self.canvas_height:
            self.y = -3
        if pos[0] <= 0:
            self.x = 3
        if pos[2] >= self.canvas_width:
            self.x = -3
        
tk = Tk ()
tk.title("Игруха")
tk.resizable(0, 0)
tk.wm_attributes("-topmost", 1)
canvas = Canvas (tk, width=500, heigth=400, bd=0,
highlightthickness=0)
canvas.pack()
tk.update()
 
ball= Ball(canvas, 'red')
 
while 1:
    ball.draw()
    tk.update_idletasks()
    tk.update()
    time.sleep(0.01)