from tkinter import *

def check(user, password):
    print(user)
    print(password)

def main():
    master = Tk()
    master.configure(bg = "navy") #cfg, set bg to grey

    w = 400
    h = 230

    wx = master.winfo_screenwidth()
    hx = master.winfo_screenheight()

    x = (wx/2) - (w/2)
    y = (hx/2) - (h/2)
    master.geometry('%dx%d+%d+%d' % (w, h, x, y-50)) # create the window
    master.title("First GUI") # window title bar


    #this is the setup script with buttons, labels and forms

    l = Label(master, text = "Login Screen", font = ("Verdana", 16), bg = "navy", fg = "white")
    l.pack(side = TOP, pady = (30, 10))

    user = Entry(master, width = 20)
    user.insert(END, "Insert your User Name!")
    user.pack(side = TOP, pady = (15, 10))

    password = Entry(master, width = 20, show = "*")
    password.insert(END, "SamplePassword")
    password.pack(side = TOP, pady = 10) # pady = 10 is the same as pady = (10, 10)

    b = Button(master, text = "Login", width = 10, command = lambda: check(user.get(), password.get()))
    b.pack(side = TOP, pady = 10)

    master.mainloop()

if __name__ == "__main__":
        main()