How to use button widget

button widget.py

import ctypes
import tkinter
from tkinter import ttk

def clicked():
    print("Button widget is clicked!")

if __name__ == "__main__":
    ctypes.windll.shcore.SetProcessDpiAwareness(1)
    root = tkinter.Tk()

    b1 = tkinter.Button(root, text="Button", bg="lightblue", width=15, command=clicked)
    b2 = tkinter.Button(root, text="Button_color", width=15, bg="black", fg="white", command=clicked)
    b3 = tkinter.Button(root, text="relief", width=15, bg="cyan", relief="solid", command=clicked)
    b4 = ttk.Button(root, text="ttk_Button", width=15, command=clicked)
    b1.pack(pady=1), b2.pack(pady=1), b3.pack(pady=1), b4.pack(pady=1)

    root.mainloop()