@pierredalati
This should be done very easy.
You have 3-Buttons.
You press BUTTON-1 and the color of this button changes, so why not just expand the code a little bit and also change color of the two other buttons simultaniously?
$w.onReady(() => {
$w("#button61").onClick(()=>{
$w("#fullWidthSlides2").changeSlide(0)
$w("#button61").style.backgroundColor="rgb(155,255,55)"
$w("#button56").style.backgroundColor="rgb(55,55,55)"
$w("#button62").style.backgroundColor="rgb(55,55,55)"
})
$w("#button56").onClick(()=> {
$w("#fullWidthSlides2").changeSlide(1)
$w("#button56").style.backgroundColor="rgb(155,255,55)"
$w("#button61").style.backgroundColor="rgb(55,55,55)"
$w("#button62").style.backgroundColor="rgb(55,55,55)"
})
$w("#button62").onClick(()=> {
$w("#fullWidthSlides2").changeSlide(2)
$w("#button62").style.backgroundColor="rgb(255,0,0)";
$w("#button61").style.backgroundColor="rgb(55,55,55)"
$w("#button56").style.backgroundColor="rgb(55,55,55)"
})
})