customized shape/image style chatbox

<style>

.CLASSNAME {
background: #FE82B624;
-webkit-mask-image: url(---LINK OF THE PNG---); /* insert the png link; tutorial on https://rentry.co/scriptedorg12 */
-webkit-mask-size: 70%; /* optional, adjust this */
-webkit-mask-repeat: no-repeat;
-webkit-mask-position: left; /* you can change this left, center, right*/
}

</style>

< iframe src LINK CHATBOX class="CLASSNAME"></iframe>

paste the class="CLASSNAME" inside the iframe src link of the cbox