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              <p id="instruction-text">Press &amp; Hold</p>
<ul id="instruction">
  <li class="nth1"></li>
  <li class="nth2"></li>
  <li class="nth3"></li>
  <li class="nth4"></li>
  <li class="nth5"></li>
  <li class="nth6"></li>
  <li class="nth7"></li>
  <li class="nth8"></li>
  <li class="nth9"></li>
  <li class="nth10"></li>  
</ul>
            
          
!
            
              $background: #222327;
$blue: #3490b7;
$pink: #FF8B87;
$red: #FF4B47;
$green: #40E64F;
$yellow: #E0C93B;
$orange: #F58F39;
$duration: 1.4s;
$num: 9;

@function ring-animation-delay($which){
  @return $duration / $num * $which;
}

* {
  -webkit-user-select: none;
  -webkit-tap-highlight-color: transparent;
}

html {
  font-size: 62.5%;
  overflow: hidden;
}
body {
  height: 100vh;
  width: 100%;
  overflow: hidden;
  background: $background;
  touch-action: none;
}
ul {
  position: absolute;
  display: block;
  width: 50vmin;
  height: 50vmin;
  transition: transform .15s ease, opacity .15s ease, mix-blend-mode .315s ease;
  transform: translate3d(-50%,-50%, 0);
  &:last-of-type {
    //mix-blend-mode: screen;
  }
  li {
    display: block;
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    border: 4vmin solid $blue;
    border-radius: 50%;
    transform: translate3d(0,0,0) scale(1);
    animation: pressed $duration 0s infinite cubic-bezier(.73,.32,.59,1.4) both, fadeOut $duration 0s infinite ease-in both;
    
    &.nth1 {
      animation-delay: ring-animation-delay(0), ring-animation-delay(0);
    }
    &.nth2 {
      border-color: $red;
      animation-delay: ring-animation-delay(1), ring-animation-delay(1);
    }
    &.nth3 {
      border-color: $green;
      animation-delay: ring-animation-delay(2), ring-animation-delay(2);
    }
    &.nth4 {
      border-color: $pink;
      animation-delay: ring-animation-delay(3), ring-animation-delay(3);
    }
    &.nth5 {
      animation-delay: ring-animation-delay(4), ring-animation-delay(4);
    }
    &.nth6 {
      border-color: $yellow;
      animation-delay: ring-animation-delay(5), ring-animation-delay(5);
    }
    &.nth7 {
      border-color: $orange;
      animation-delay: ring-animation-delay(6), ring-animation-delay(6);
    }
    &.nth8 {
      border-color: $green;
      animation-delay: ring-animation-delay(7), ring-animation-delay(7);
    }
    &.nth9 {
      border-color: $yellow;
      animation-delay: ring-animation-delay(8), ring-animation-delay(8);
    }
    &.nth10 {
      border-color: $red;
      animation-delay: ring-animation-delay(9), ring-animation-delay(9);
    }
  }
}

@keyframes fadeOut {
  100% {
    opacity: 0;
  }
}
@keyframes pressed {
  0% {
    transform: translate3d(0,0,0) scale(0);
  }
}
@keyframes fadeIn {
  100% {
    opacity: 1;
  }
}

#instruction-text {
  display: flex;
  justify-content: center;
  color: #ededfb;
  font-size: 5vmin;
  letter-spacing: .045em;
  font-family: -apple-system, "Segoe UI", "Helvetica-Neue", sans-serif;
  height: 90vh;
  align-items: flex-end;
  position: absolute;
  width: 100%;
  z-index: 100;
  animation: fadeIn 8s 0s 2 alternate ease-out;
  opacity: 0;
}
#instruction {
  top: 50vh;
  left: 50%;
  li {
    animation-iteration-count: 5;
  }
}

@-ms-viewport {
  width: device-width;
}
@viewport {
  width: device-width;
}

            
          
!
            
              var NUM = 9;
var MOUSE = 'mouse';
var current = {
  mouse: {},
  pointer: {},
  touch: {},
  actives: {}
};

if (window.PointerEvent) {
  document.body.addEventListener('pointerdown', down, false);
  document.body.addEventListener('pointermove', move, false);
  document.body.addEventListener('pointerup', up, false);
} else {
  document.body.addEventListener('mousedown', down, false);
  document.body.addEventListener('touchstart', down, false);
  
  document.body.addEventListener('touchmove', move, false);
  document.body.addEventListener('mousemove', move, false);

  document.body.addEventListener('mouseup', up, false);
  document.body.addEventListener('touchend', up, false);
}

function down(e) {
  console.log(e.type);
  e.preventDefault();
  var eventType = e.type.replace('down','').replace('start','');
 
  if (eventType === 'pointer') {
    var main = createMain(e, eventType);
    getPointerPressure(e, main);
    getPointerTilt(e, main);
  } else if (eventType === 'touch' && e.changedTouches) {
    e.preventDefault();
    [].slice.call(e.changedTouches).forEach(function(changedTouch) {
      var main = createMain(changedTouch, eventType);
      getTouchForce(e, main);
    });
  } else { //mouse
    var main = createMain(e, eventType);
    getMouseForce(e, main);
  }
}

function createMain(e, eventType) {
  var main = document.createElement('ul');
  var id = e.pointerId || e.identifier || MOUSE; //pointer || touch || mouse
  main.setAttribute('data-id', id);
  current[eventType][id] = main;
  current.actives[id] = {
    main: main,
    left: (e.pageX) + 'px',
    top: (e.pageY) + 'px'
  }
  for (var i = 0; i < NUM; i++) {
    var ring = document.createElement('li');
    ring.className = eventType + ' nth' + (i + 1);
    ring.setAttribute('data-id', id);
    main.appendChild(ring);

    ring.addEventListener('animationiteration', function(e2) {
      if (e2.animationName === 'pressed' && e2.target.classList.contains('ended')) {
        var target = e2.target;
        if (target && target.parentNode) {
          target.style.animation = 'none';
          target.parentNode.removeChild(target);
        }
      }
    });
  }
  document.body.appendChild(main);
  return main;
}

function move(e) {
  var eventType = e.type.replace('move','');
  if (eventType === 'pointer') {
    var main = current[eventType][e.pointerId];
    moveMain(e, e.pointerId);
    getPointerPressure(e, e.pointerId);
    getPointerTilt(e, main);
  } else if (eventType === 'touch' && e.changedTouches) {
    [].slice.call(e.changedTouches).forEach(function(changedTouch) {
      var main = current[eventType][changedTouch.identifier];
      if (main) {
        moveMain(changedTouch, changedTouch.identifier)
        getTouchForce(changedTouch, changedTouch.identifier);
      }
    });
  } else {
    var main = current.mouse.mouse;
    if (main) {
      moveMain(e, MOUSE)
      getMouseForce(e, MOUSE);
    }
  }
}

function moveMain(e, id) {
  var it = current.actives[id];
  it.left = (e.pageX) + 'px',
  it.top = (e.pageY) + 'px'
}

function up (e) {
  var eventType = e.type.replace('up','').replace('end','');
  if (eventType === 'pointer' || eventType === 'mouse') {
    endMain(e, eventType); 
  } else if (e.changedTouches) {
    e.preventDefault();
    [].slice.call(e.changedTouches).forEach(function(changedTouch) {
      endMain(changedTouch, eventType);
    });
  }
}
  
function endMain(e, eventType) {
  var id = e.pointerId || e.identifier || MOUSE;
  [].slice.call(current[eventType][id].querySelectorAll('li')).forEach(function(el) {
    el.classList.add('ended');
  });
  delete current.actives[id];
  delete current[eventType][id];
}




function getPointerPressure(e, el) {
  var pressure = e.pressure;
  if (pressure && pressure != .5 && el) {
    var value = 50 + (Math.min(25 * pressure, 25)) + 'vmin';
    console.log(value);
    el.style.width = value;
    el.style.height = value;
  }
}
function getTouchForce(changedTouch, id) {
  if (changedTouch.force) {
    var value = 50 + (25 * changedTouch.force) + 'vmin';
    current.actives[id].width = value;
  }
}
function getMouseForce(e, id) {
  var force = e.force || e.webkitForce;
  if (force) {
    var value = 50 + (Math.min(10 * force, 25)) + 'vmin';
    current.actives[id].width = value;
  }
}
function getPointerTilt(e, el) {
  var tiltX = e.tiltX;
  var tiltY = e.tiltY;
  if (tiltX != 0 && tiltY != 0 && el) {
    console.log('tilt', tiltX, tiltY);
    var value = 'translate3d(-50%,-50%,0) rotateX('+tiltY+'deg) rotateY('+tiltX+'deg)';
    el.style.transform = value;
  }
}

function animate() {
  for (var key in current.actives) {
    var active = current.actives[key];
    var style = active.main.style;
    style.left = active.left;
    style.top = active.top;
    if (active.width) {
      style.width = active.width;
      style.height = active.width;
    }
  }
  requestAnimationFrame(animate);
}
animate();


document.body.addEventListener('contextmenu', function(e) {
  e.preventDefault();
});


//because touches are weird, and get stuck sometimes... haven't figured out cause yet
// setInterval(function() {
  
// }, 2000)
            
          
!
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