owl responsive

responsive : {
    // breakpoint from 0 up
    0 : {
        option1 : value,
        option2 : value,
        ...
    },
    // breakpoint from 480 up
    480 : {
        option1 : value,
        option2 : value,
        ...
    },
    // breakpoint from 768 up
    768 : {
        option1 : value,
        option2 : value,
        ...
    }
}<div class="owl-carousel owl-theme">
    <div class="item"><h4>1</h4></div>
    <div class="item"><h4>2</h4></div>
    <div class="item"><h4>3</h4></div>
    <div class="item"><h4>4</h4></div>
    <div class="item"><h4>5</h4></div>
    <div class="item"><h4>6</h4></div>
    <div class="item"><h4>7</h4></div>
    <div class="item"><h4>8</h4></div>
    <div class="item"><h4>9</h4></div>
    <div class="item"><h4>10</h4></div>
    <div class="item"><h4>11</h4></div>
    <div class="item"><h4>12</h4></div>
</div>