how can i turn my mouse on and off?

Here is how:

import turtle

wn = turtle.Screen() # Create screen
t = turtle.Turtle('turtle') # Create turtle

def drag(x, y): # Define drag function
    t.ondrag(0)
    t.setheading(t.towards(x, y))
    t.goto(x, y)
    t.ondrag(drag)

t.ondrag(drag) # Use function on turtle
wn.mainloop()

Output:

EDIT: As pointed out by @cdlane in the comments, the 0 in the t.ondrag method should optimally be None, as the former defines a new event function that throws an exception that isn’t seen as it’s protected by except Exception: pass.