For example
let fade400={
"duration":400,
"delay":0
};
let fade600={
"duration":600,
"delay":0
};
let fade1000={
"duration":1000,
"delay":0
};
$w("#anchorx"). onViewportLeave((event) => {
$w('#wildlifelogomain').show("fade", fade400); //Has duration 400ms
});
$w("#anchorx").onViewportEnter((event) => {
$w('#wildlifelogomain').hide("fade", fade600); //Has duration 600ms
});
$w("#anchorx").onViewportLeave((event) => {
$w('#donatebuttonfull').hide("fade", fade1000); //Has duration 1000ms
});