body {
    background: #FFC107;
    font-family: 'Permanent Marker', cursive;
    font-size: 15px;
}
h1{
    clear: both;
}
.left-box {
    width: 45%;
    height: 500px;
    border: 1px solid black;
    float: left;
    margin-right: 50px;
    background: url("https://www.stlmag.com/downloads/291284/download/0219_Elmwood_0016.jpg?cb=05f56521ae049e15a8f3d244cafb3822&w=640");
    background-attachment: scroll;
    background-repeat: no-repeat;
}

.center-box {
    float: left;
    width: 20%;
    height: 500px;
    border: solid 1px black;
    margin-right: 50px;
    text-align: center;
}

.right-box {
    float: left;
    width: 20%;
    height: 500px;
    border: solid 1px red;
    text-align: center;
}
.show {
    clear: both;
    width: 1330px;
    height: 150px;
    text-align: center;
}

@media(max-width: 800px) {
    body {
        background: yellowgreen;
    }
    .left-box {
        float: none;
        margin: auto;
    }
    .center-box, .right-box, .show {
        float: none;
        width: 45%;
        height: auto;
        margin: auto;
        border: none;
    }
}

@media(max-width: 1180px) {
    h1, p{
        text-align: center;
    }
    .left-box {
        float: none;
        margin: auto;
        background: url("https://k6u8v6y8.stackpathcdn.com/blog/wp-content/uploads/2018/04/going-beyond-idli-dosa-south-india.png");
        width: 90%;
        margin: auto;
        background-attachment: fixed;
        background-repeat: no-repeat;
        height: 400px;
    }
    .center-box, .right-box, .show {
        float: none;
        width: 45%;
        height: auto;
        margin: auto;
        border: none;
    }
}