How to execute after() method in the second page when it actually gets open using frame in tkinter?

Question

Following is the code that by default shows the StartPage (first Frame) when the app runs, as soon as the user clicks on the button, it redirects to another page i.e., Page1 (second Frame). I want to execute self.after(3000, lambda: (canvas.create_image(50,50,image=self.character1, anchor=NW))) after 3 seconds when the user clicks on the button when the second page (frame) opens. But what I'm getting currently is the after() method executes after 3 seconds but on the initiation of the app. i.e., when the StartPage appears. Please help me to achieve this in my code. I'm new in tkinter! Thanks.

from tkinter import *
from PIL import Image, ImageTk
   
class tkinterApp(Tk): 
      
    # __init__ function for class tkinterApp  
    def __init__(self, *args, **kwargs):  
          
        # __init__ function for class Tk 
        Tk.__init__(self, *args, **kwargs) 
          
        # creating a container 
        container = Frame(self)   
        container.pack(side = "top", fill = "both", expand = True)  
   
        # initializing frames to an empty array 
        self.frames = {}
        
        # iterating through a tuple consisting 
        # of the different page layouts 
        for F in (StartPage, Page1): 
   
            frame = F(container, self) 
   
            # initializing frame of that object from 
            # startpage, page1, page2 respectively with  
            # for loop 
            self.frames[F] = frame  
   
            frame.grid(row = 0, column = 0, sticky ="nsew")
        self.update() #edited this
        self.show_frame(StartPage)
   
    # to display the current frame passed as 
    # parameter 
    def show_frame(self, cont): # cont = page_name
        if cont not in self.frames:
            self.frames[cont] = cont(container, self)
        frame = self.frames[cont]
        frame.tkraise()
        frame.event_generate("<<ShowFrame>>")
   
# first window frame startpage 
   
class StartPage(Frame):
    def __init__(self, parent, controller):
        Frame.__init__(self, parent)
        self.bind("<<ShowFrame>>", self.myStartPage)

    def myStartPage(self,controller):
        super(StartPage).__init__()
        print(controller)
        canvas = Canvas(self,width=300, height=300, bd=0, highlightthickness=0, relief='ridge')
        canvas.pack()

        self.background = PhotoImage(file="background.png")
        canvas.create_image(300,300,image=self.background, tags="B")

        self.character1 = PhotoImage(file="bg-e-butd.png")
        obj1 = canvas.create_image(50,50,image=self.character1, anchor=NW)
        canvas.tag_bind(obj1, '<1>', lambda event=None : controller.show_frame(Page1)) 
           
      
# second window frame page1  
class Page1(Frame): 
      
    def __init__(self, parent, controller): 
          
        Frame.__init__(self, parent)

        canvas = Canvas(self,width=300, height=300, bd=0, highlightthickness=0, relief='ridge')
        canvas.pack()

        self.background = PhotoImage(file="background.png")
        canvas.create_image(300,300,image=self.background, tags="B")

        self.character1 = PhotoImage(file="bg-e-butd.png")
        self.after(1000, lambda: (canvas.create_image(50,50,image=self.character1, anchor=NW)))

   
# Driver Code 
app = tkinterApp()
app.title("Title")
app.mainloop()