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HTML 

              
                <div id="canvas"></div>

























<!-- 01101110 01010000 01010011 00110010 -->
!

CSS 

              
                html, body
{
	width: 100%;
	height: 100%;
	overflow: hidden;
	margin: 0;
	padding: 0;
	user-select: none;
}

*{
	-webkit-tap-highlight-color:  rgba(255, 255, 255, 0); 
}

body
{
	background-color: lightgray;
}

#canvas
{
	position: absolute;
	top: 0;
	bottom: 0;
	left: 0;
	right: 0;
	cursor: pointer;
}
!

JS 

              
                
let pixelate = false;
let background = false;




interface Position
{
	x: number;
	y: number;
}


class Ember
{
	emberBlobs:any[] = [];
	embers:any;
	
	constructor(colors:number[], app:any, pixelate = false)
	{
		
		this.embers = new PIXI.Container();
		
		if(pixelate)
		{
			this.embers.filters = [new PIXI.filters.PixelateFilter()]
		}
		
		colors.map(color => {
			var circle = new PIXI.Graphics();
			circle.lineStyle(0);
			circle.beginFill(color, 1);
			circle.drawCircle(0, 0, 10);
			circle.endFill();

			this.emberBlobs.push(app.renderer.generateTexture(circle));
		})
		
		
		setInterval(() => {
			this.addEmber();
		}, 300)
	}
	
	stoke()
	{
		let amount = 40 + Math.round(Math.random() * 20);
		for(let i = 0; i < amount; i++)
		{
			this.addEmber();
		}
	}
	
	makeBlob()
	{
		let texture = this.emberBlobs[Math.floor(Math.random() * this.emberBlobs.length)]
		let blob = new PIXI.Sprite(texture);
		blob.anchor.set(0.5);
		let scaleScale = Math.random();
		blob.scale.set(0.4 * scaleScale, .5 * scaleScale);
		return blob;
	}
	
	addEmber()
	{
		let time = this.time * (0.3 + (Math.random() * 0.6));
		let blob = this.makeBlob();
		this.embers.addChild(blob);
		
		
		let bezier = [
			{
				x: (Math.random() * 100) - 50,
				y: -100
			},
			{
				x: Math.random() * 200 - 100, 
				y: -100 + Math.random() * -20
			},
			{
				x: Math.random() * 200 - 100, 
				y: -100 + (Math.random() * -50)
			},
			{
				x: Math.random() * 200 - 100, 
				y: -200 + (Math.random() * -50)
			},
			{
				x: Math.random() * 300 - 150, 
				y: -250 + (Math.random() * -100)
			},
			{	x: Math.random() * 500 - 250,  
			 	y: -500 + (Math.random() * -150)
			}]
		TweenMax.to(blob, time / 2, { delay: time/2, ease: Power1.easeOut, alpha: 0});
		TweenMax.to(blob.position, time, {
			ease: Power1.easeOut, 
			bezier: bezier, 
			onComplete: () => {
				this.embers.removeChild(blob);
				blob = null;
		}})
		
		
	}
	
	get time()
	{
		return 2 + Math.random() * 1.5;
	}
}

class Fire
{
	flame:any;
	cutout:any;
	fire:any;
	
	fireBlob:any;
	cutoutBlob:any;
	
	constructor(color:number, app, pixelate = false)
	{
		this.flame = new PIXI.Container();
		this.cutout = new PIXI.Container();
		this.fire = new PIXI.Container();
		
		this.flame.addChild(this.fire);
		this.flame.addChild(this.cutout);
		
		this.fire.alpha = 0.7;
		
		var circle = new PIXI.Graphics();
		circle.lineStyle(0);
		circle.beginFill(color, 1);
		circle.drawCircle(0, 0, 35);
		circle.endFill();
		this.fireBlob = app.renderer.generateTexture(circle);
		
		var cutoutCircle = new PIXI.Graphics();
		cutoutCircle.lineStyle(0);
		cutoutCircle.beginFill(0x000000, 1);
		cutoutCircle.drawCircle(0, 0, 40);
		cutoutCircle.endFill();
		this.cutoutBlob = app.renderer.generateTexture(cutoutCircle);
		
		let filters = {
			bloom: new PIXI.filters.AdvancedBloomFilter(0.45, 0.5, 0.5),
			pixel: pixelate ? new PIXI.filters.PixelateFilter() : new PIXI.filters.VoidFilter(),
			void: new PIXI.filters.VoidFilter()
		}
		
		this.flame.filters = [filters.bloom, filters.pixel, filters.void];
		
    	this.flame.filters[this.flame.filters.length - 1].blendMode = PIXI.BLEND_MODES.SCREEN;
		
		setInterval(() => {
			this.addFlame();
			this.addCutout(Math.random() > .5 ? true : false);
		}, 50)
		
	}
	
	makeBlob(texture)
	{
		let blob = new PIXI.Sprite(texture);
		blob.anchor.set(0.5);
		return blob;
	}
	
	addCutout(left)
	{
		let time = this.time * (0.7 + (Math.random() * 0.2));
		let blob = this.makeBlob(this.cutoutBlob);
		this.cutout.addChild(blob);
		let scale = [
			1,
			0.75 + (Math.random() * 1)
		]
		blob.position.x = (130 + (Math.random() * 50)) * (left ? -1 : 1);
		let targetX = (5 + (Math.random() * 60)) * (left ? -1 : 1);
		blob.scale.set(scale[0]);
		TweenMax.to(blob, time, {ease: Power1.easeIn, pixi: { x:targetX, y: -270, scaleX: scale[1], scaleY: scale[1]}, onComplete: () => {
			this.cutout.removeChild(blob);
			blob = null;
		}})
	}
	
	addFlame()
	{
		let time = this.time;
		let blob = this.makeBlob(this.fireBlob);
		this.fire.addChild(blob);
		let scale = [
			1.2 + Math.random(), 
			0.5 + Math.random()
		]
		let bezier = [
			{
				x: 0,
				y: 0
			},
			{
				x: Math.random() * 100 - 50, 
				y: Math.random() * -20
			},
			{
				x: Math.random() * 100 - 50, 
				y: Math.random() * -50 + -50
			},
			{	x: 0, 
			 	y: -150 + Math.random() * -100
			}]
		blob.scale.set(scale[0]);
		TweenMax.to(blob, time, {ease: Power1.easeIn, bezier: bezier, ease: Power0.easeOut})
		TweenMax.to(blob, time, {pixi: {scaleX: scale[1], scaleY: scale[1]}, onComplete: () => {
			this.fire.removeChild(blob);
			blob = null;
		}})
	}
	
	get time()
	{
		return 1 + Math.random() * .4;
	}
	
	set y(y){ this.flame.position.y = y };
	set x(x){ this.flame.position.x = x };
	set scale(s){ this.flame.scale.set(s)};
}

class Stage
{
	app:any;
	stage:any;
	flamesContainer:any;
	flames = [];
	
	constructor(canvas:HTMLElement, pixelate = false, background = false)
	{
		this.app = new PIXI.Application(window.innerWidth, window.innerHeight, { antialias: true, backgroundColor : background ? 0x0f0f0f : 0x11111D });
		canvas.appendChild(this.app.view);
		
		this.stage = new PIXI.Container();
		this.flamesContainer = new PIXI.Container();
		
		if(background)
		{
			var background = PIXI.Sprite.fromImage('https://assets.ste.vg/codepen/fire-background.png')
			var light = PIXI.Sprite.fromImage('https://assets.ste.vg/codepen/light.png');

			this.add(background);
			this.add(light, this.flamesContainer);

			background.anchor.set(0.5);
			background.scale.set(0.8);
			background.position.y = -150;

			light.anchor.set(0.5);
			light.scale.set(1);
			light.position.y = 20;
			
			setInterval(() => {
				light.alpha = 0.3 + Math.random() * 0.2;
			}, 50)
		}
		
		this.add(this.stage, this.app.stage);
		this.add(this.flamesContainer);
		
		this.flamesContainer.scale.set(0.75);
		
		
		let flames = [
			{color: 0xE23B00, scale: 1, offset: -30},
		 	{color: 0xFE8200, scale: 1, offset: -10},
			{color: 0xFBE416, scale: 0.9, offset: 10},
			{color: 0xFDFDB4, scale: 0.7, offset: 30}
		]
		
		let ember = new Ember([0xFE9C00, 0xFEA600, 0xE27100], this.app, pixelate);
		this.add(ember.embers, this.flamesContainer);
		
		flames.map((settings) => {
			
			let fire = new Fire(settings.color, this.app, pixelate);
			this.flames.push(fire);
			fire.y = settings.offset;
			fire.scale = settings.scale;
			fire.flame.pivot.set(0, 10);
			
			this.add(fire.flame, this.flamesContainer);
		})
		
		
		
		this.onResize();
		let f = this.flames.map(fire => fire.flame);
		f.pop();
		this.stokeAnimation = new TimelineMax();
		this.stokeAnimation.to(f, 0.3, {ease: Power2.easeOut, pixi:{scaleY: 1.2, scaleX: 1.15}})
		this.stokeAnimation.to(f, 1.4, {ease: Bounce.easeOut, pixi:{scaleY: 1, scaleX: 1}})
		this.stokeAnimation.stop();
		
		window.addEventListener('resize', e => { this.onResize() });
		window.addEventListener('click', e => 
		{
			ember.stoke();
			this.stokeAnimation.restart();
		})
	}
	
	
	
	onResize = function()
	{
		this.app.renderer.resize(window.innerWidth, window.innerHeight);
		this.stage.position.x = window.innerWidth / 2;
		this.stage.position.y = window.innerHeight * 0.75;
	}
	
	add = function(element:any, container = this.stage)
	{
		container.addChild(element);
	}
	
	remove = function(element:any, container = this.stage)
	{
		container.removeChild(element);
	}
}


let stage = new Stage(document.getElementById('canvas'), pixelate, background);
!
999px

Console