in ChatbotUI/src/app/components/main/chat/chatbar/chatbar.component.ts [279:286]
setCyclicBackgroundImages() {
if (this.loaderTextIndex == 3) {
this.loaderTextIndex = 0;
}
this.leftContainerClass = 'left-side-container-' + (this.loaderTextIndex + 1);
this.rightContainerClass = 'right-side-container-' + (this.loaderTextIndex + 1);
this.loaderTextIndex++;
}