I'm having problems with where to place "if arg 1 is not set:"
https://gyazo.com/5d8fde46b50bdb3a0a00aae309bd0dd6
https://gyazo.com/8cf6e291bab683d92dd10f00013e9987
https://gyazo.com/5d8fde46b50bdb3a0a00aae309bd0dd6
https://gyazo.com/8cf6e291bab683d92dd10f00013e9987