如果我希望下面的绿线比红线迟出现,
应该怎么做,能用按回车键控制吗?
多谢了!!!

from Tkinter import *
tk = Tk()
canvas = Canvas(tk, bg="white", bd=0, highlightthickness=0)
canvas.pack(fill=BOTH, expand=YES)
canvas.create_line(100, 200, 350, 200, arrow=LAST,fill='red')
canvas.create_line(100, 0, 100, 200, arrow=FIRST,fill="green")
tk.mainloop()