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let isFirstTime = true;
function getRandomInt(min, max) {
min = Math.ceil(min);
max = Math.floor(max);
return Math.floor(Math.random() * (max - min + 1)) + min;
}
function setRandomBlob() {
blob.style.width = getRandomInt(50, 100) + '%';
blob.style.height = getRandomInt(50, 100) + '%';
blob.style.rotate = getRandomInt(0, 360) + 'deg';
}
function randomPosition(element) {
var x = getRandomInt(0, window.innerWidth);
var y = getRandomInt(0, window.innerHeight);
element.style.position = 'absolute';
element.style.left = x + 'px';
element.style.top = y + 'px';
}
function main() {
if (!isFirstTime) {
let fadeOutAnimation = blob.animate([
// keyframes
{ opacity: .40 },
{ opacity: 0, scale: .8}
], {
// timing options
duration: 3000,
iterations: 1,
fill: 'forwards'
});
fadeOutAnimation.onfinish = () => {
setRandomBlob();
randomPosition(blob);
blob.animate([
// keyframes
{ opacity: 0, scale: .8 },
{ opacity: .40, scale: 1 }
], {
// timing options
duration: 3000,
iterations: 1,
fill: 'forwards'
});
};
} else {
setRandomBlob();
randomPosition(blob);
blob.animate([
// keyframes
{ opacity: 0 },
{ opacity: .40 }
], {
// timing options
duration: 3000,
iterations: 1,
fill: 'forwards'
});
isFirstTime = false;
}
setTimeout(main, getRandomInt(7500, 30000));
}
main();
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