What is output?

$ne{w}_1$ist $=[10,20,30,40]$

for i in new$\_$list$[$::

print$($i$)$

new$\_$value $=$ new$\_$list.pop$(\backslash$theta$)$

$10$

$20$

$30$

$40$

$10$

$30$

$20$

$40$

$20$

$30$

$40$