Image on background for a mode

[Leeoneil-Vely]

Hello everyone,
I'm really sorry, but i'm struggling with a basic feature : I "just" want to add an image when a mode start.
For example my attract mode.

I've put my image file on a "images" directory

In my config.yaml, i've put this :
slides:
slide_fond:
- type: image
width: 1280
height: 1024

In my atractshow, i've added this :

• time: 0
  slides:
  slide_fond:
  widgets:
  • type: image
    width: 1280
    height: 1024
    file: fond_test.jpg

It's simply crashing at starting.
Is there a very simple example with an image somewhere ?
Lot's of example with text, but I don't understand how to re-create it for an image.

I tried this on the config file of the mode, without success

images:
fond_test:
file: images/fond_test.jpg
load: mode_start

slides:
slide_fond_test:
- type: image
image: fond_test

Thank's for your help !