Creating a frame with 4 command buttons

[Heyjoe]

Hello python users:

The following code is to create a frame with four command buttons. It does this. However, before it creates the frame with four command buttons, it creates a frame with no buttons. Why does it create the frame with no buttons?

import tkinter as tk
myfont = "Helvitica 30"
mybg = "lightskyblue"


class Main:

    def __init__(self, root):
        self.root = tk.Tk()
        self.root.geometry("500x500")
        self.createfstframe()

    def createfstframe(self):
        fstframe = tk.Frame(root)
        fstframe.pack(padx=100, pady=100)
        self.Hellobn=tk.Button(fstframe,text = "Hello", bg = mybg, font = myfont)
        self.Hellobn.pack(fill = tk.BOTH, expand = 1)
        self.Howyoubn = tk.Button(fstframe, text="How are you? ",bg = mybg ,font = myfont)
        self.Howyoubn.pack(fill = tk.BOTH, expand = 1)
        self.clickherebn = tk.Button(fstframe, text = "Click here to start", bg = "deepskyblue",font = myfont)
        self.clickherebn.pack(fill = tk.BOTH, expand = 1)
        self.quitbn = tk.Button(fstframe,text = "Quit", font = myfont, bg = "red", command = fstframe.quit)
        self.quitbn.pack(fill = tk.BOTH, expand = 1)


root = tk.Tk()
b=Main(root)
root.mainloop()