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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.

            
              // copy this into your project
@mixin colorcycle($color-list: #222 #111, $duration: 5s, $name: "colorcycle") {
  & { 
    // target only the element with these params.
    background-color: nth($color-list, 1);
    animation-name: #{$name}; 
    //animation is named after the element it resides in. 
    animation-duration: $duration;
    animation-timing-function: linear;
    animation-iteration-count: infinite;
  }
  
  @keyframes #{$name} {
    // go through each color in the list
    @each $color in $color-list {
      // get the current index of the color
      $i: index($color-list, $color);
      // Set the percent of the animation frames based on how many colors are in the list
      $percent: ($i - 1)/length($color-list)*100; 
      #{$percent}% {
          background-color: $color; 
      }
    }
    100% {
      background-color: nth($color-list,1);
    }
  }
}

input, select {
    border:0;
    display:inline;
		background-color: rgba(0,0,20,0.4);
		color: #DEDEDE;
		padding: 3% 4%;
		&.invalid {
			border-left: 0.2rem solid #FA3433;
		}
		&:focus {
			background-color: #222244;
			  outline-width: 0;
		}
}

.matrix {
	width:100%;
  input {
	cursor: pointer;
		border-radius: 0;
		background-color: rgba(0,0,20,0.2);
    border:0;
    display:inline;
    font-size:1.2rem;
    width: 50%;
		text-align:center;
		padding: 4% 0%;
		transition: background-color 0.2s;
		&:hover {
			transition: background-color 0.2s;
			background-color: rgba(10,10,20,0.5);
		}
		&:focus {
			transition: background-color 0.2s;
			@include colorcycle(rgba(0,0,20,0.2) rgba(50,50,200,0.5), 0.5s, "bluecycle");
			color: transparent;
			  outline-width: 0;
			text-shadow: 0px 0px 0px #FFFFFF;
		}
		&::placeholder { 
			text-shadow: 0px 0px 0.1px rgba(255,255,255,0.3);
		}

  }

  &.matrix-4 input{
    width: 50%;
  }
    &.matrix-9 input {
    width: 33%;
  }
    &.matrix-16 input{
    width: 25%;
  }
}

body {
	display: flex;
	align-items: center;
  justify-content: center;
	width: 100vw;
	height: 100vh;
	overflow: hidden;
	color: #DEDEDE;
	background-color: #090915;
}

hr {
	height:0.2rem;
	border:0;
	background-color: #292931;
}

.editor {
	margin-top: -1.2rem;
	border-radius: 0.4rem;
	padding: 1.2rem 1.2rem;
	background-color: #333338;
	border: 1px solid black;
	width: 28rem;
}

.functions {
	margin-bottom: 0.5rem;
	display:flex;
	justify-content: center;
		input {
			width:80%;
		}
		select {
			border: 0;
			margin-left: 0.5rem;
			appearance: none
		}
}

.code {
		display:flex;
	justify-content: center;
}

pre {
	width:50%;
	padding:1rem;
	background-color: rgba(0,0,20,0.4);
	font-size: 11px;
	margin:0;
	margin-top: 0.5rem;
	&:last-child {
		margin-left: 0.5rem;
	}
}
            
          
!
            
              const MAT4SIZE = 16;

const MATSIZES = {
	MAT4: 16,
	MAT3: 9,
	MAT2: 4
};

const MATRICES = {
	MAT4: "MAT4",
	MAT3: "MAT3",
	MAT2: "MAT2"
};

const MATLENGTH = {
	16: MATRICES.MAT4,
	9: MATRICES.MAT3,
	4: MATRICES.MAT2
};

const ROWLENGTH = {
	16: 4,
	9: 3,
	4: 2
};

const STRIP_BRACKETS = /[\[\]\s]/g;

let reduceMat = (matrix, size) => {
	return matrix.reduce((a, v, i) => {
		return (
			a +
			` ${v}${i < matrix.length - 1 ? "," : ""}` +
			`${i % size == size - 1 ? "\n" : ""}`
		);
	}, "\n");
};

let renderGLSLMatrix = matrix => {
	if(MATLENGTH[matrix.length]) {
		return `${MATLENGTH[matrix.length].toLowerCase()}(${reduceMat(matrix, ROWLENGTH[matrix.length])})`;
	}
};

let renderJSMatrix = matrix => {
	if(ROWLENGTH[matrix.length]) {
	return `[${reduceMat(matrix, ROWLENGTH[matrix.length])}]`;
	}
};

let shrinkMat = (matrix, newSize) => {
	let currentRowSize = ROWLENGTH[matrix.length];
	let rowSize = ROWLENGTH[newSize];
	let sliceSize = matrix.length - newSize;
	return matrix
		.map((v, i) => {
			let remove = i % currentRowSize + 1 > rowSize || i > newSize + 1;
			if (remove) {
				sliceSize--;
			}
			return remove ? null : v;
		})
		.filter(v => v != null);
};

let expandMat = (matrix, newSize) => {
	return matrix.concat(new Array(newSize - matrix.length).fill(0));
};

let validMatrix = matrix => {
	return ROWLENGTH[matrix.length] != undefined;
};

class OptionSelect extends React.Component {
	static defaultProps = {
		selected: null,
		options: ["none"],
		onChange: e => console.log(e)
	};

	constructor(props) {
		super(props);
		this.handleChange = this.handleChange.bind(this);
	}

	handleChange(e) {
		this.props.onChange(e.target.value);
	}

	render() {
		return (
			<select onChange={this.handleChange}>
				{this.props.options.map(o => (
					<option selected={this.props.selected == o}>{o}</option>
				))}
			</select>
		);
	}
}

class MatrixInput extends React.Component {
	static defaultProps = {
		matrix: new Array(16).fill(0),
		onSubmit: e => console.log(e)
	};
	state = {
		focus: false,
		valid: null
	};
	constructor(props) {
		super(props);
		this.handleFocus = this.handleFocus.bind(this);
		this.handleBlur = this.handleBlur.bind(this);
		this.submit = this.submit.bind(this);
	}
	handleBlur(e) {
		this.setState({ focus: false });
	}
	handleFocus(e) {
		this.setState({ focus: true });
	}
	submit(e) {
		if(e.target.value != "") {
			let matrix = this.parseInput(e.target.value);

			if (this.state.focus && validMatrix(matrix)) {
				this.props.onSubmit(matrix);
			}
			this.setState({ valid: validMatrix(matrix) });
			return;
		}
		this.setState({valid: null});
	}

	parseInput(input) {
		let parsedInput = input.replace(STRIP_BRACKETS, "");
		return parsedInput.split(",").map(v=>v=="" ? 0 : v);
	}

	render() {
		return (
			<input
				placeholder="Type / Paste Matrix Here. Comma Delimited."
				className={this.state.valid || this.state.valid == null ? "" : "invalid"}
				type="text"
				onKeyUp={this.submit}
				onFocus={this.handleFocus}
				onBlur={this.handleBlur}
			/>
		);
	}
}

class MatrixEdit extends React.Component {
	static defaultProps = {
		matrix: new Array(16).fill(0),
		onChange: e => console.log(e)
	};

	state = {
		matrix: [],
	};

	selected = null;

	constructor(props) {
		super(props);

		this.handleFocus = this.handleFocus.bind(this);
		this.handleBlur = this.handleBlur.bind(this);
		this.handleChange = this.handleChange.bind(this);
		this.handleMouseWheel = this.handleMouseWheel.bind(this);
		addEventListener("wheel", this.handleMouseWheel);
	}

	componentDidMount() {
		this.setState({ matrix: this.props.matrix });
	}

	componentWillReceiveProps(newProps, props) {
		if (props.matrix != newProps.matrix) {
			this.setState({ matrix: newProps.matrix });
		}
	}

	handleBlur(e) {
		if (this.selected.value === "") {
			let index = parseInt(e.target.name, 10);
			let value = this.state.matrix[index];
			this.updateValue(index, value)
		}
		this.selected = null;
	}

handleMouseWheel(e) {
	if(this.selected && !isNaN(this.state.matrix[parseInt(this.selected.name, 10)])) {
			let index = parseInt(this.selected.name, 10);
			let value = parseFloat((this.state.matrix[index]-(e.deltaY/10000)).toFixed(4),10);
			this.updateValue(index, value);
	}
}

	updateValue(index, value) {
		let newMatrix = this.setIndex(index, value == "" ? 0 : value);
		this.props.onChange(newMatrix);
	}

	handleFocus(e) {
		this.selected = e.target;
		this.selected.placeholder = this.selected.value;
		this.selected.value = "";
	}

	handleChange(e) {
		let index = parseInt(e.target.name, 10);
		this.updateValue(index, e.target.value)
	}

	setIndex(index, value) {
		let matrix = this.state.matrix.slice();
		matrix[index] = value;
		return matrix;
	}

	render() {
		let components = [];
		this.state.matrix.map((v, i) => {
			components.push(
				<input
					value={v}
					type="text"
					name={i}
					onChange={this.handleChange}
					onFocus={this.handleFocus}
					onBlur={this.handleBlur}
				/>
			);
		});
		return (
			<div className={`matrix matrix-${this.state.matrix.length}`}>
				{components}
			</div>
		);
	}
}

class MatrixDisplay extends React.Component {
	static defaultProps = {
		matrix: new Array(16).fill(0)
	};

	state = {
		matrix: []
	};

	constructor(props) {
		super(props);
	}

	componentDidMount() {
		this.setState({ matrix: this.props.matrix });
	}

	componentWillReceiveProps(newProps, props) {
		if (props.matrix != newProps.matrix) {
			this.setState({ matrix: newProps.matrix });
		}
	}

	render() {
		return (
			<div className="code">
				<pre>{renderGLSLMatrix(this.state.matrix)}</pre>
				<pre>{renderJSMatrix(this.state.matrix)}</pre>
			</div>
		);
	}
}

class App extends React.Component {
	state = {
		size: MATRICES.MAT4,
		matrix: new Array(MATSIZES[MATRICES.MAT4]).fill(0)
	};
	constructor() {
		super();
		this.changeMatrix = this.changeMatrix.bind(this);
		this.pasteMatrix = this.pasteMatrix.bind(this);
	}

	changeMatrix(newMatrix) {
		this.setState({ matrix: newMatrix });
	}

	pasteMatrix(newMatrix) {
		let size = MATLENGTH[newMatrix.length];
		this.setState({ matrix: newMatrix, size: size });
	}

	changeSize(option) {
		let size = MATSIZES[option];
		let matrix = [];
		if (size < this.state.matrix.length) {
			matrix = shrinkMat(this.state.matrix, size);
		} else {
			matrix = expandMat(this.state.matrix, size);
		}
		this.setState({ matrix: matrix, size: MATRICES[option] });
	}

	render() {
		return (
			<div className="editor">
				<div className="functions">
					<MatrixInput onSubmit={this.pasteMatrix} />
					<OptionSelect
						onChange={this.changeSize.bind(this)}
						options={Object.keys(MATRICES)}
						selected={this.state.size}
					/>
				</div>
				<MatrixEdit matrix={this.state.matrix} onChange={this.changeMatrix} />

				<MatrixDisplay matrix={this.state.matrix} />
			</div>
		);
	}
}
ReactDOM.render(<App />, window.root);

            
          
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