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Here you can Sed posuere consectetur est at lobortis. Donec ullamcorper nulla non metus auctor fringilla. Maecenas sed diam eget risus varius blandit sit amet non magna. Donec id elit non mi porta gravida at eget metus. Praesent commodo cursus magna, vel scelerisque nisl consectetur et.

HTML

              
                <div class=container>
    <div class="wrapper"></div>
    <div class="date-display"></div>
    <div class="patient">PATIENT: Nick Watton</div>
    <div class="ping-edge"></div>
    <div class="heart-rate">46</div>
    <div class="interact-wrapper"></div>

    <div class="instructions">
         <p>&lt;&lt;&lt; SEDATE</p>
         <p>Mouse-over above to change heart rate</p>
         <p>EXCITE &gt;&gt;&gt;</p>
    </div>
</div>
              
            
!

CSS

              
                @import url('https://fonts.googleapis.com/css?family=Roboto+Mono|Source+Code+Pro:900&display=swap');
$white: whitesmoke;
$green: #bada55;
html{
	font-size: 62.5%;
}
body{
	background:
		radial-gradient(black 15%, transparent 16%) 0 0,
		radial-gradient(black 15%, transparent 16%) 8px 8px,
		radial-gradient(rgba(255,255,255,.1) 15%, transparent 20%) 0 1px,
		radial-gradient(rgba(255,255,255,.1) 15%, transparent 20%) 8px 9px;
	background-color:#0b0b0b;
	background-size:16px 16px;
	color: $green;
	font-family: 'Roboto Mono', monospace;
}
.container{
	margin:0 auto;
	position: relative;
	width: 600px;
	div{
		box-sizing:border-box;
		position:absolute;
		width:inherit;
	}
	.patient,
	.date-display{
		padding:20px;
		text-align: right;
	}
	.patient{
		text-align: initial;
	}
	.heart-rate{
		color: $white;
		font-family: 'Source Code Pro', monospace;
		font-weight:bold;
		top: 332px;
		font-size:3.6rem;
		text-align: center;
	}
	.ping-edge{
		border: 4px double $white;
		height: 120px;
		left:1px;
		top: 51px;
	}
	canvas{
		border: 1px solid $white;
	}
	.interact-wrapper{
		height: 600px;
		position:absolute;
		width:100%;
	}
 .instructions{
     bottom:-600px;
     font-size: 1rem;
     height:30px;
     position:relative;
     p{
      text-align:center;
      position:absolute;
      width:100%;
      &:first-child{
       text-align:left;
      }
      &:last-child{
       text-align:right;
      }
     }
    } 
}
              
            
!

JS

              
                window.requestAnimFrame = (function(){
  return  window.requestAnimationFrame       ||
          window.webkitRequestAnimationFrame ||
          window.mozRequestAnimationFrame    ||
          window.oRequestAnimationFrame      ||
          window.msRequestAnimationFrame     ||
          function(callback, element){
            window.setTimeout(callback, 1000 / 60);
          };
})();

let wrapper, canvas, context, width=600, height=600, Tau=Math.PI*2,
systems = [], heartSystem,
pingSystem, pingBase=3, ping=pingBase, pingSpeed=1,
ticker = 1,
bpm = 46, // Target beats per minute to display
bpmMin = 28, bpmMax = 120,
bps = (60 / bpm) * 1000, // BPM converted to beats per second, in milliseconds, for timer interval
repaintColour='rgba(0,0,0, .05)', // Alpha allows particle path to fade slowly
pathObjects=[];
pathObjects.push( {pLength:0, dom:null, pcStep:0, pt:null, id:'heart', shape:'M 209.95 88.4 Q 210 86.85 210 86.5 210 86.05 210 85.6 210.65 27.5 177.7 7.25 143.7 -13.75 104.9 26 66.3 -13.75 32.3 7.25 -1.85 28.2 0.1 89.75 2.05 151.35 104.9 230 207.95 151.35 209.9 89.75 209.9 89.05 209.95 88.4 Z'} );
pathObjects.push( {pLength:0, dom:null, pcStep:0, pt:null, id:'smallHeart', shape:'M 174.15 97.5 Q 174.2 96.45 174.2 96.25 174.2 95.95 174.2 95.65 174.6 57.35 152.9 44.05 130.5 30.2 104.95 56.4 79.55 30.2 57.15 44.05 34.65 57.85 35.9 98.35 37.2 138.95 104.95 190.75 172.85 138.95 174.15 98.35 174.15 97.9 174.15 97.5 Z'} );
pathObjects.push( {pLength:0, dom:null, pcStep:0, pt:null, id:'line', shape:'M0,0 l20,0z'} );

var ParticleSystem = function(){
    Object.defineProperty(this, 'colour', { value:'#FF1515', writable:true });
    Object.defineProperty(this, 'friction', { value:.9, writable:true });                // f < 1 == slows;  f > 1 == speeds up
    Object.defineProperty(this, 'height', { value:100, writable:true });
    Object.defineProperty(this, 'maxSpeed', { value:10, writable:true });
    Object.defineProperty(this, 'numParticles', { value:50, writable:true }); 
    Object.defineProperty(this, 'particles', { value:[], writable:true });
    Object.defineProperty(this, 'springTo', { value:true, writable:true });
    Object.defineProperty(this, 'springForce', { value:.01, writable:true });           // speed of return to spring point. tightness
    Object.defineProperty(this, 'wandering', { value:true, writable:true });
    Object.defineProperty(this, 'wander', { value:1, writable:true });                  // bigger number - fuzzier .05 just perceptible
    Object.defineProperty(this, 'wanderMod', { value:this.wander*.5, writable:true });
    Object.defineProperty(this, 'width', { value:100, writable:true });
}
ParticleSystem.prototype.generate = function(){
    for(let j=0; j<pathObjects.length; j+=1){
        pathObjects[j].pcStep = pathObjects[j].pLength / this.numParticles;
    }
    let pShapeArrayX, pShapeArrayY;
    for(let i=0; i<this.numParticles; i++){
        // pass in pattern points
        pShapeArrayX = [];
        pShapeArrayY = [];
        for(let p=0; p<pathObjects.length; p+=1){
            pathObjects[p].pt = pathObjects[p].dom.getPointAtLength(i*pathObjects[p].pcStep);
            pShapeArrayX.push(pathObjects[p].pt.x + ((this.width-190)/2));
            pShapeArrayY.push(pathObjects[p].pt.y + ((this.height-200)/2));
        }
        this.particles.push(new Particle(pShapeArrayX, pShapeArrayY, this));
    }
}
ParticleSystem.prototype.update = function(){
    for(let i=0; i<this.numParticles; i++){
        this.particles[i].pUpdate();
    }
}
ParticleSystem.prototype.pShapeMorph = function(value){
    for(let i=0; i<this.numParticles; i++){
        this.particles[i].pChangeSpringPoint(value);
    }
}

var Particle = function(x, y, parentSystem){
    Object.defineProperty(this, 'shapesX', { value:x, writable:true });
    Object.defineProperty(this, 'shapesY', { value:y, writable:true });
    Object.defineProperty(this, 'x', { value:this.shapesX[0], writable:true });
    Object.defineProperty(this, 'y', { value:this.shapesY[0], writable:true });
    Object.defineProperty(this, 'sx', { value:this.x, writable:true });
    Object.defineProperty(this, 'sy', { value:this.y, writable:true });
    Object.defineProperty(this, 'vx', { value:0, writable:true });
    Object.defineProperty(this, 'vy', { value:0, writable:true });
    Object.defineProperty(this, 'parentSystem', { value:parentSystem, writable:true });
    return this;
}
Particle.prototype.pChangeSpringPoint = function(value){
    // change spring point - causes morph
    if(value < 0) value = 0;
    if(value >= this.x.length) value = this.x.length-1;
    this.sx = this.shapesX[value];
    this.sy = this.shapesY[value];
}
Particle.prototype.pUpdate = function(){
    // randomise movement slightly
    if(this.parentSystem.wandering){
        this.vx += Math.random() * this.parentSystem.wander - this.parentSystem.wanderMod;
        this.vy += Math.random() * this.parentSystem.wander - this.parentSystem.wanderMod;
    }
    // apply friction
    this.vx *= this.parentSystem.friction;
    this.vy *= this.parentSystem.friction;
    // constrain to speed bounds
    let speed = Math.sqrt(this.vx*this.vx + this.vy*this.vy);
    if (speed > this.parentSystem.maxSpeed) {
        this.vx = this.parentSystem.maxSpeed * this.vx / speed;
        this.vy = this.parentSystem.maxSpeed * this.vy / speed;
    }
    // stay attached to point
    if(this.parentSystem.springTo){
        this.vx += (this.sx - this.x) * this.parentSystem.springForce;
        this.vy += (this.sy - this.y) * this.parentSystem.springForce;
    }
    // update position
    this.x += this.vx;
    this.y += this.vy;
}

function createCanvas(id, w, h){
    let tCanvas = document.createElement('canvas');
    tCanvas.width = w;
    tCanvas.height = h;
    tCanvas.id = id;
    return tCanvas;
}
function init(){
    let tPath;
    for(let i=0; i<pathObjects.length; i+=1){
        tPath = document.createElementNS('http://www.w3.org/2000/svg','path');
        tPath.setAttribute('d', pathObjects[i].shape);
        pathObjects[i].dom = tPath;
        pathObjects[i].pLength = tPath.getTotalLength();
    }
    wrapper = document.querySelector('.wrapper');
    canvas = createCanvas('canvas', width, height);
    wrapper.appendChild(canvas);
    context = canvas.getContext('2d');
    /* Define new ParticleSystems and set values */
    heartSystem = new ParticleSystem();
    heartSystem.width = width;
    heartSystem.height = height + 150;
    heartSystem.numParticles = 100;
    heartSystem.springForce = .03;
    heartSystem.wander = .5;
    heartSystem.generate();
	   //
    pingSystem = new ParticleSystem();
    pingSystem.colour = '#bd5';
    pingSystem.width = width;
    pingSystem.height = height;
    pingSystem.numParticles = 1;
    pingSystem.springForce = .01;
    pingSystem.wander = .2;
    pingSystem.generate();
    pingSystem.pShapeMorph(2);
    //
    systems.push(heartSystem);
    systems.push(pingSystem);
    // Interactively change base heartrate
    document.querySelector('.interact-wrapper').addEventListener('mousemove', (e) => {
       bpm = Math.round(map(e.offsetX, 0,width, bpmMin,bpmMax));
       bps = (60 / bpm) * 1000;
    } );
}
function update(){
    for(let i=0; i<systems.length; i++){
        systems[i].update();
    }
    // Override ping particle update
    pingSystem.particles[0].sx = ping += pingSpeed;
    pingSystem.particles[0].sy = (Math.random() * 100 + 120) ;
    if(ping > width+80){
        resetPing();
    }
}
function resetPing(){
    ping = pingBase;
    pingSystem.particles[0].sx = ping;
    pingSystem.particles[0].x = ping;
}
function draw(){
    for(let i = 0; i < systems.length; i++){
        let system = systems[i];
        context.fillStyle = system.colour;
        let particle;
        for(let j = 0; j < system.numParticles; j+=1) {
            particle = system.particles[j];
            context.beginPath();
            context.arc(particle.x, particle.y, 1, 0, Tau, false);
            
            context.fill();
        }
    }
}

/* Switch between small and big heart, to create beat */
function heartBeat(){
    let pulseDuration = ticker % 2 ? (bps*.33) : (bps*.66); // Heart contraction is faster
    heartSystem.pShapeMorph(ticker++ % 2);

    // Make ping line respond to heartbeat
    pingSystem.particles[0].sy = ticker % 2 ? (bps*.33) * -1 : (bps*.66) * -1;

    // Recurse function with asymetric beat
    setTimeout(() => heartBeat(), Math.random() * 100 + pulseDuration);
}
function animate(){
    context.fillStyle = repaintColour;
    context.fillRect(0, 0, width, height);
    update();
    draw();
    requestAnimFrame(animate);
}
function updateUI(){
     document.querySelector('.date-display').innerHTML = new Date().toLocaleString();
     document.querySelector('.heart-rate').innerHTML = bpm + Math.round(Math.random()*4 - 2);
     setTimeout(() => updateUI(), 1000);
}

/* Maps number (v) in input range(i1/12) to equivalent in output range (o1/o2) */
function map(v, i1, i2, o1, o2){
     return o1 + (o2 - o1) * ((v - i1) / (i2 - i1));
}
init();
resetPing();
animate();
heartBeat();
updateUI();

              
            
!
999px

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