HTML <div class=”buttonFrame”><div class=”btn”></div></div> CSS .buttonFrame { position: relative; width: 55px; height: 20px; border-radius: 12px; border: 2px solid black; overflow: hidden; top: 30%; left: 45%; z-index: 100px; } .btn { border-radius: 12px; width: 0%; height: 0%; background: linear-gradient( 90deg, rgba(2, 0, 36, 1) 0%, rgba(9, 9, 121, 1) 35%, rgba(6, 78, 166, 1) 57%, rgba(3, […]