# Tk_sketchpad_min.py

# Tk_sketchpad_min.py

from Tkinter import Tk, Canvas

def begin(event):
    global oldx, oldy
    oldx, oldy=event.x, event.y
def draw(event):
    global oldx, oldy, canas
    newx, newy=event.x, event.y
    canvas.create_line (oldx, oldy, newx, newy)
    oldx, oldy=newx, newy
root=Tk()
oldx, oldy=0,0
canvas=Canvas(root, height=2000, width=3000)
canvas.bind("<Button-1>",begin)
canvas.bind("<Button1-Motion>",draw)
canvas.pack()

root.mainloop()