yes it’s clear now
For a moving background, please use the ParallaxScrollingBackground item, or see how it is done in the ChickenOutbreak demo in the file Level.qml. You should not use Timers for shifting the Images, but rather use the onYChanged signal of the Image. I am also not sure how big, i.e. how high your clouds image is, but usually you will need to make it 576×368 for the sd version, 1152×736 for hd and 2304×1472 for hd2 to support widescreen devices as well (see the guide How to create mobile games for different screen sizes and resolutions). And then you would need to make 2 images below each other, exactly like in ChickenOutbreak demo. But the easier way to do this is using the ParallaxScrollingBackground, as this item does it automatically.