style.css

#all{
    background-image: url("Brick_Game.png");
    background-size: 350px 660px;
    width: 350px;
    height: 660px;
    display: block;
    margin-top: -20px;
    margin-left: 30%;
    position: absolute;
}

.mainContainer{
    width: 150px;
    margin-left: 100px;
    margin-top: 40px;
}

.squareItem {
    background-color: #f4f4f4;
    text-align: center;
    font-size: 30px;
    width: 10px;
    height: 10px;
    float: left;
    border: 1px solid gray;
    box-sizing: border-box;
}

#start {
    background-color: transparent;
    display: inline-block;
    cursor: pointer;
    width: 50px;
    height: 40px;
    margin-top: 107%;
    margin-left: 2%;
}

#start:active {
    transform: translateY(2px);
}

.maroon {
    background-color:  #33334d;
    text-align: center;
    font-size: 30px;
    width: 10px;
    height: 10px;
    float: left;
    border: 1px solid gray;
    box-sizing: border-box;
}

.red {
    background-color: orangered;
    text-align: center;
    font-size: 30px;
    width: 10px;
    height: 10px;
    float: left;
    border: 1px solid gray;
    box-sizing: border-box;
}

.green {
    background-color: green;
    text-align: center;
    font-size: 30px;
    width: 10px;
    height: 10px;
    float: left;
    border: 1px solid gray;
    box-sizing: border-box;
}

.blue {
    background-color: navy	;
    text-align: center;
    font-size: 30px;
    width: 10px;
    height: 10px;
    float: left;
    border: 1px solid gray;
    box-sizing: border-box;
}

.pink {
    background-color: magenta;
    text-align: center;
    font-size: 30px;
    width: 10px;
    height: 10px;
    float: left;
    border: 1px solid gray;
    box-sizing: border-box;
}