im trying to figure out how to bump incrementally up my squares, can anybody help understanding how to do that and deliver it back to a function/loop. i assume its something like sz += 20 but i cant find out how to do it correctly?

## thanks

import turtle

def draw_square(t, sz):

for i in range(4):

t.forward(sz)

t.left(90)

def main():

wn = turtle.Screen()

wn.bgcolor(“lightgreen”)

```
alex = turtle.Turtle()
alex.color('hotpink')
alex.pensize(3)
for i in range(5):
draw_square(alex, 20)
#draw_square(alex, sz = 20 + sz)
draw_square(sz = 20 + sz)
alex.penup()
alex.forward(40)
alex.left(90)
alex.pendown()
wn.exitonclick()
```

if **name** == “**main**”:

main()