How to reduce my code

Question

I'm doing a little page to try what I learnt. it's pretty simple, when you click a color appears and you can save it in the box on the side. I would create a function that put the color in the big rectangle in a smaller one. for the moment it works but I wrote 4 times the function just changing the rectangle to fill. how can I create a function I can call and define easily without have to write it again and again?
https://code.sololearn.com/W3KgFIp9ApsN/?ref=app

Answer 1

https://code.sololearn.com/WGh82dkBYm7g/?ref=app

Answer 2

haw yeah ok.. I'll try to understand that ! cheers

Answer 3

I'm trying to figure out but I stay stuck on this part :
x = x==colors.lenght-1? x=0:x+1
I understand that it is used for increment x, or reset the value of x if x = colors.lenght-1. what I don't get is the "x= x==" ... not sure I'm really clear aha