I am currently working on a piece of python turtle code that requires me to randomly place circles within my square. For some reason, they are always placed in a diagonal line and do not get drawn randomly.

```
import random
import turtle

for i in range(15):
    # draws 15 circles and then stops
    random_position = random.randint(-80,90)

    # allows the computer to pick any number between -80 and 90 as an x or y co-ordinate
    pit_x = random_position 
    pit_y = random_position 
    pit_radius = 7

    # radius of circle
    turtle.penup()
    turtle.setposition(pit_x, pit_y-pit_radius)
    turtle.pendown()
    turtle.begin_fill()
    turtle.circle(pit_radius)
    turtle.end_fill()
    turtle.hideturtle()

    # the circle is now a black hole

```

This is how it appears:

![result](https://i.stack.imgur.com/VWfZ7.png)

How can I fix this?