import tkinter as tk

def tk_01():
    """Create a window that will ask the user to enter their name. When they
       click on a btn_acept it should display the message 'Hello' and their
       name and change the background colour and font colour of the message
       box."""
    def click():
        name = txt_in_box.get()
        if name == "":
            reset()
        else:
            txt_out_box["fg"] = "black"
            txt_out_box["bg"] = "magenta"
            txt_out_box["text"] = f"Hola {name}"
            txt_in_box.delete(0, 'end')
        txt_in_box.focus()

    def reset():
        txt_out_box["fg"] = "red"
        txt_out_box["bg"] = "cyan"
        txt_out_box["text"] = ""

    window = tk.Tk()
    window.title("Saludo TK")
    window.geometry("390x200")

    lbl_info = tk.Label(text="Ingresa tu nombre: ")
    lbl_info.place(x=40, y=25, width=150, height=35)

    txt_in_box = tk.Entry()
    txt_in_box["justify"] = "center"
    txt_in_box.place(x=180, y=25, width=150, height=35)
    txt_in_box.focus()

    txt_out_box = tk.Message(text="")
    txt_out_box["fg"] = "red"
    txt_out_box["bg"] = "cyan"
    txt_out_box["justify"] = "center"
    txt_out_box["width"] = 250
    txt_out_box["font"] = "TkHeadingFont"
    txt_out_box.place(x=40, y=120, width=300, height=50)

    btn_acept = tk.Button(text="ACEPTAR", command=click)
    btn_acept.place(x=40, y=75, width=300, height=35)
    window.mainloop()