[Tkinter] Command button, then more command buttons

[Heyjoe]

I am a beginner trying to learn Tkinter.

The objectives of the following code are to
1) Show a red "Press here to start button."
2) After the "Press here to start button is pressed it disappears and 5 option command buttons come up.

Questions
1) The red "Press here to start button" does not disappear, when the option buttons appear. I know I could use pack_forget or destroy to accomplish this but I can't get them to work.
2) Is using a function to get the second set of command buttons to come up, the usual way this is done or is there a better way?

from tkinter import *
root = Tk()
root.geometry("800x800")

#Secondmenu brings up a second set of buttons.  How do I make the "Press here to starbutton" disappear before this second set of buttons come up

def secondmenu():

    Option1  = Button(root, text="Option1", bg="white", \
                            fg="firebrick", relief = "groove", font = "Helvitica 30",).pack()

    Option2  = Button(root, text="Option2", bg="white", \
                            fg="firebrick", relief = "groove", font = "Helvitica 30",).pack()

    Option3  = Button(root, text="Option3", bg="white", \
                            fg="firebrick", relief = "groove", font = "Helvitica 30", ).pack()

    Option4  = Button(root, text="Option4", bg="white", \
                            fg="firebrick", relief = "groove", font = "Helvitica 30", ).pack()

    Option5  = Button(root, text="Option5", bg="white", \
                            fg="firebrick", relief = "groove", font = "Helvitica 30",).pack()


#This is the button you will see when you start the program

start = Button(root, text="Press here to start", bg="red", fg="black", font = "Helvitica 30",command = secondmenu).pack()
#start.pack_forget()


root.mainloop()