ValueError: empty range for randrange() [closed]

I had this error message that can’t be resolved while trying to code using turtle and random.

Exception in Tkinter callback
Traceback (most recent call last):
File “C:\Users\Anh\AppData\Local\Programs\Python\Python310\lib\tkinter_init_.py”, line 1921, in call
return self.func(*args)
File “C:\Users\Anh\AppData\Local\Programs\Python\Python310\lib\turtle.py”, line 685, in eventfun
fun()
File “C:\Users\Anh\Desktop\Programs\Python File\e.py”, line 408, in explosion
fy = random.randint(posy – 3, posx + 3)
File “C:\Users\Anh\AppData\Local\Programs\Python\Python310\lib\random.py”, line 370, in randint
return self.randrange(a, b+1)
File “C:\Users\Anh\AppData\Local\Programs\Python\Python310\lib\random.py”, line 353, in randrange
raise ValueError(“empty range for randrange() (%d, %d, %d)” % (istart, istop, width))
ValueError: empty range for randrange() (204, 30, -174)

The code that seemed to cause this error message is:

def explosion():
    #Blast
    posx = random.randrange(-500, 500)
    posy = random.randrange(100, 300)

    b.penup()
    b.pensize(4)
    b.setheading(360)
    b.setpos(posx, posy-10)
    b.pendown()
    b.begin_fill()
    for x in range(4):
        b.circle(10, 90)
    b.end_fill()
    time.sleep(0.5)
    b.clear()

    #Fire

    for x in range(random.randrange(3, 6)):


        fx = random.randint(posx - 3, posx + 3)
        fy = random.randint(posy - 3, posx + 3)

        f.penup()
        f.pensize(4)
        f.setheading(360)
        f.setpos(fx, fy-6)
        f.pendown()
        f.begin_fill()
        for y in range(4):
            f.circle(6, 90)
        f.end_fill()
    time.sleep(0.7)
    f.clear()

I’ve set this function to onkey() function, and the error code seemed to appear at random times. I’ve tried to reverse posx – 3 and posx + 3, but it didn’t help either.