main.css

body {
    text-align: center;
    overflow: hidden;
    background-image: url("http://bgfons.com/upload/grass_texture241.jpg");
    background-attachment: fixed;
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
}

.header {
    font-family: Roboto, Verdana;
    opacity: 0;
    position: absolute;
    display: block;
    width: 100%;
    margin: auto;
    transition: all 2s;
    color: #fff;
}

#headerTransition {
    top: 5%;
    font-size: 4vmax;
}

.headerBefore {
    top: 40%;
    font-size: 6vmax;
}

.box {
    display: inline-block;
    width: 500px;
    height: 500px;
    margin-top: 40px;
    position: relative;
    top: 10vh;
    opacity: 0;
    transition: all 2s;
}

.box .pad {
    width: 48%;
    height: 48%;
    left: 0px;
    border: 5px solid #333;
    box-shadow: 0px 0px 2px #222;
    display: inline-block;
    float: left;
    position: relative;
}

.topLeftGreen {
    background-color: green;
    border-top-left-radius: 100%;
}

.topRightRed {
    background-color: darkred;
    border-top-right-radius: 100%;
}

.bottomLeftYellow {
    background-color: darkorange;
    border-bottom-left-radius: 100%;
}

.bottomRightBlue {
    background-color: blue;
    border-bottom-right-radius: 100%;
}

.simon {
    font-family: 'Roboto', verdana;
    font-size: 3vm;
    top: 5%;
    position: relative;
}

.settings {
    height: 55%;
    width: 55%;
    border-radius: 100%;
    background-color: #fff;
    border: 10px solid #333;
    box-shadow: 0px 0px 2px #333;
    position: absolute;
    top: 20%;
    left: 20%;
}

.count {
    background-color: #32050C;
    height: 20%;
    width: 25%;
    border-radius: 5%;
    border: 5px solid #333;
    box-shadow: 0px 0px 2px #333;
    position: absolute;
    display: inline-block;
    top: 40%;
    left: 10%;
    padding: 1px;
    font-family: VT323, monospace;
    font-size: 5.5vmax;
    color: #f00;
}

.start {
    background: linear-gradient(red, #A50000);
    height: 15%;
    width: 15%;
    border-radius: 100%;
    border: 2px solid #333;
    box-shadow: 0px 0px 5px #333;
    position: absolute;
    display: inline-block;
    top: 43%;
    /*left: 10%;*/
    padding: 1px;
}

.startLabel {
    position: absolute;
    display: inline-block;
    top: 55%;
    left: 53%;
}

.strict {
    background: linear-gradient(yellow, #909000);
    height: 15%;
    width: 15%;
    border-radius: 100%;
    border: 2px solid #333;
    box-shadow: 0px 0px 5px #333;
    position: absolute;
    display: inline-block;
    top: 43%;
    left: 70%;
    padding: 1px;
}

.strictLed {
    background: linear-gradient(black, grey);
    height: 3%;
    width: 3%;
    border-radius: 100%;
    border: 1px solid #333;
    box-shadow: 0px 0px 1px #333;
    position: absolute;
    display: inline-block;
    top: 38%;
    left: 75%;
}

.strictLabel {
    position: absolute;
    display: inline-block;
    top: 55%;
    left: 73%;
}

h5 {
    font-family: 'Roboto', Verdana;
    font-size: 1vm;
    text-align: center;
    vertical-align: 100%;
}

.switch {
    background-color: #32050C;
    height: 10%;
    width: 20%;
    border-radius: 5%;
    border: 5px solid #333;
    box-shadow: 0px 0px 2px #333;
    position: absolute;
    top: 75%;
    left: 40%;
    font-family: Verdana;
    font-size: 40px;
    color: #f00;
}

.switchLabel {
    position: absolute;
    display: inline-block;
    top: 85%;
    left: 44%;
}

.onOff {
    display: block;
    position: relative;
    background-color: cyan;
    border: 2px solid #333;
    box-shadow: 0px 0px 2px #333;
    height: 85%;
    width: 45%;
    transition: left 0.5s;
}

#on {
    left: 46%;
}

.off {
    left: 0%;
}

@media screen and (max-width: 950px) {
    .simon {
        font-size: 3vmax;
    }

    h5 {
        font-size: 1.2vmax;
    }

    .count {
        font-size: 5vmax;
    }
}

@media screen and (max-width: 590px) {
    .box {
        width: 95%;
        height: 40%;
    }

    .box .pad {
        width: 40%;
        height: 60%;
    }

    .settings {
        width: 20%;
        height: 70%;
    }
}

@media screen and (max-width: 415px) {
    .box {
        left: 2%;
        height: 60%;
    }

    .box .pad {
        width: 45%;
        height: 45%;
    }

    .settings {
        width: 50%;
        height: 50%;
    }
}

/*box animation*/
@keyframes rotateIt {
    100% {
        transform: rotate(360deg);
        -webkit-transform: rotate(360deg);
        -moz-transform: rotate(360deg);
        -o-transform: rotate(360deg);
    }
}

/*canvases animation*/
@keyframes scaleInOut {
    0% {
        transform: scale(0.1);
        -webkit-transform: scale(0.1);
        -moz-transform: scale(0.1);
        -o-transform: scale(0.1);
        opacity: 0;
    }
    60% {
        transform: scale(2);
        -webkit-transform: scale(2);
        -moz-transform: scale(2);
        -o-transform: scale(2);
        opacity: 1;
    }
    100% {
        transform: scale(1);
        -webkit-transform: scale(1);
        -moz-transform: scale(1);
        -o-transform: scale(1);
    }
}