YAA i dont mind at all !! I dunno if you're using an actual animation program or a video program like mine, but after effects has effect presents that allow you to do it, If you are using after effects here are the exact order/presents and values u will need to make the outline of the gif 

I'm not sure if other video programs will have it because after effects is a really detail intensive program for editing videos and many other video programs will just have like set out effects and presents, but I definitely know that programs like adobe animate or tv paint will definitely have an outline option (I'm not sure what though) also THANK YOUU!! i really appreciate it I hope this helps