Change the picture icone

Hello, I would like to change this picture.
http://prntscr.com/mi0h8g
what should I do ?
Could you help me please ?

It is an image in this folder templates/ja_diner/images/decor/decor_orange.png

and it is defined in /templates/ja_diner/local/css/themes/bie/template.css line 5197
you can override with a new image or delete css call

.acm-slideshow::before {
  background: url('../../../../images/decor/decor_orange.png');

Regards

It's perfect thansk ! pavit