import tkinter

fnt1 = ('Times New Roman', 20)
fnt2 = ('Times New Roman', 40)
index = 0
timer = 0

key = ''

def key_down(e):
    global key
    key = e.keysym

def main():
    global index, timer
    canvas.delete('STATUS')
    timer = timer + 1
    canvas.create_text(200, 30, text = 'index ' + str(index), fill = 'white', font = fnt1, tag = 'STATUS')
    canvas.create_text(400, 30, text = 'timer ' + str(timer), fill = 'cyan', font = fnt1, tag = 'STATUS')

    if index == 0:
        if timer == 1:
            canvas.create_text(300, 150, text = '標題', fill = 'white', font = fnt2, tag = 'TITLE')
            canvas.create_text(300, 300, text = 'Press[SPACE]Key', fill = 'lime', font = fnt1, tag = 'TITLE')
        if key == 'space':
            canvas.delete('TITLE')
            canvas.create_rectangle(0, 0, 600, 400, fill = 'blue', tag = 'GAME')
            canvas.create_text(300, 150, text = '遊戲中', fill = 'white', font = fnt2, tag = 'GAME')
            canvas.create_text(300, 300, text = '[E] 結束', fill = 'yellow', font = fnt1, tag = 'GAME')
            index = 1
            timer = 0

    if index == 1:
        if key == 'e':
            canvas.delete('GAME')
            canvas.create_rectangle(0, 0, 600, 400, fill = 'maroon', tag = 'OVER')
            canvas.create_text(300, 150, text = 'GAME OVER', fill = 'red', font = fnt2, tag = 'OVER')
            index = 2
            timer = 0

    if index == 2:
        if timer == 30:
            canvas.delete('OVER')
            index = 0
            timer = 0

    root.after(100, main)

root = tkinter.Tk()
root.title('index 與 timer')
root.bind('<KeyPress>', key_down)
canvas = tkinter.Canvas(width = 600, height = 400, bg = 'black')
canvas.pack()
main()
root.mainloop()