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HTML

              
                <link href="https://fonts.googleapis.com/css?family=Asap|Baloo|Cinzel|Lobster" rel="stylesheet">

<header>
	<img src="http://circleofdocs.com/wp-content/uploads/2015/12/icon256.png" />
	<h1>Pomodoro Clock</h1>	
</header>

<div class="configGroups">
	<div class="configs green">
		<div class="title">
			Break Lenght
		</div>
		<div class="formButtons">
			<input id="break" value="5" type="number"/>
			<div class="buttons">
				<buttom onclick="add('break')">+</buttom>
				<buttom onclick="remove('break')">-</buttom>
			</div>
		</div>
	</div>

	<div class="configs red">
		<div class="title">
			Session Lenght
		</div>
		<div class="formButtons">
			<input id="session" type="number" value="25" />
			<div class="buttons">
				<buttom onclick="add('session')">+</buttom>
				<buttom onclick="remove('session')">-</buttom>
			</div>
		</div>
	</div>
</div>

<div class="clock" id="divClock">
	<input id="clock" type="text" value="00:00" disabled />
</div>

<div class="actions">
	<buttom onclick="start()">Start</buttom>
	<buttom onclick="reset()">Reset</buttom>
</div>

<footer>Designed & Coded by 
  <span>Nurielly Caroline Brizola</span>
  <div class="icons">
    <a href="https://codepen.io/nurycaroline/">
      <i class="fa fa-codepen"></i>
    </a>
    <a href="https://github.com/nurielly">
      <i class="fa fa-github"></i>
    </a>
    <a href="https://www.facebook.com/NuriellyCaroline">
      <i class="fa fa-facebook"></i>
    </a>
    <a href="https://br.linkedin.com/in/nurielly-caroline-brizola-b2693a40"> <i class="fa fa-linkedin" aria-hidden="true"></i> </a>
  </div>
</footer>
              
            
!

CSS

              
                $red: #E53D31;
$green: #57D52B;
$colors: (red: $red, green: $green);

@mixin configs-input-color($color) {
	border: 2px solid $color;
	color: $color;
}
@mixin configs-buttons-color($color) {
	color: $color;
}
@mixin configs-buttons-bg-border($color){
	background-color: $color;
	border: 2px solid $color;
	margin-left: 1px;
}

header {
	display: flex;
	width: 100%;
	align-items: center;
	justify-content: center;
}

img {
	width: 100px;
	height: 100px;
}

h1 {
	font-size: 70px;
	font-family: 'Lobster', cursive;
}

input {
	font-family: 'Cinzel', serif;
	background-color: #fff;
	font-size: 55px;
	height: 60px;
	width: 145px;
	padding-left: 10px;
}

buttom {
	width:20px;
	padding: 4.2px;
	font-size: 20px;
	text-align: center;
	font-family: 'Baloo', cursive;
	margin-bottom: 1px;
	cursor: pointer;
}

.configGroups {
	display: flex;
  flex-direction: row;
  justify-content: space-around;
	margin-left: auto;
	margin-right: auto;
	margin-top: 20px;
}


.configs {
	display: flex;
	flex-direction: column;
	font-family: 'Cinzel', serif;
	
	.title {
		width: 100%;
		text-align:center;
		font-size: 20px;
		font-weight: bold;
	}
	
	.formButtons{
		display: flex;
	}
	
	.buttons{
		display: flex;
		flex-direction: column;
	}
}

@each $chave, $color in $colors {
  .configs.#{$chave} input{
	@include configs-input-color($color);
  }
}

.configs.green buttom{
	@include configs-buttons-color($red);
	@include configs-buttons-bg-border($green);
}
.configs.red buttom{
	@include configs-buttons-color($green);
	@include configs-buttons-bg-border($red);
}

.actions {
	display: flex;
	justify-content: space-around;
	margin-left: auto;
	margin-right: auto;
	margin-top: 25px;
	
	buttom{
		box-shadow: 0.2em 0 0.4em $red;
		width: 100px;
		padding: 15px;
		@include configs-buttons-color(#fff);
		@include configs-buttons-bg-border($red);
	}
}


/*   --- Clock ---   */
.clock {
	margin: 15px auto 15px auto;
	width: 200px;
	height: 200px;
	border-radius: 100%;
	border: 20px solid $green;
	box-shadow: 0.2em 0 0.4em $red;
	background-color: $red;
	text-align: center;
	align-items: center;
	display: flex;
	justify-content: center;

	input {
		height: 60px;
		width: 145px;
		border: none;
		background-color: $red;
		color: #fff;
		text-align: center;
		font-size: 55px;
		font-weight: bold;
	}
}

.clock.break {
	border: 20px solid $red;
	box-shadow: 0.2em 0 0.4em $green;
	background-color: $green;
	
	input {
		background-color: $green;
	}
}

input::-webkit-outer-spin-button,
input::-webkit-inner-spin-button {
    -webkit-appearance: none;
}

footer{
  text-align: center;
  margin-top: 30px;
  
  span{
    color: $red;  
    font-weight: bold;
  }
  
  .fa {
    color: $green;
  }
}
              
            
!

JS

              
                var interval;

add = (elementId) => {
    let element = document.getElementById(elementId);
	element.value = +element.value + 1; 
};

remove = (elementId) => {
    let element = document.getElementById(elementId);
	element.value = +element.value - 1;
};

reset = () => {
	document.getElementById('divClock').className = "clock";
	start();
};

updateClock = (second, minute) => {
	let seconds = second < 10 ?  `0${second}` : second; 
	let minutes = minute < 10 ? `0${minute}` : minute; 
	document.getElementById('clock').value = `${minutes}:${seconds}`;
};

breakInterval = () => {
	window.clearInterval(interval);
	let minute = +document.getElementById('break').value - 1;
	let second = 59;

	interval = window.setInterval(() => {
		if (second == 0) { 
			minute--;
			second = 59; 
		}
		updateClock(second, minute);
		second--;
		if (minute == 0 && second == 0){
			window.clearInterval(interval);
		}
	}, 1000);
};

start = () => {
	window.clearInterval(interval);
	let minute = +document.getElementById('session').value - 1;
	let second = 59;

	interval = window.setInterval(() => {
		if (second == 0) { 
			minute--;
			second = 59; 
		}

		updateClock(second, minute);						
		second--;
		if (minute == 0 && second == 0){
			document.getElementById('divClock').className = "clock break";
			breakInterval();
		}
	}, 1000);
};
              
            
!
999px

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