html,
body {
    height: 100%;
    width: 100%;
    background-color: #FFFFFF;
}

.center {
    margin: 0;
    position: absolute;
    top: 50%;
    left: 50%;
    margin-right: -50%;
    transform: translate(-50%, -50%)
}

.loader {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-top: 20px;
}

.continuous-4 {
  width: 120px;
  height: 22px;
  border-radius: 40px;
  color: #039D55;
  border: 2px solid;
  position: relative;
  overflow: hidden;
}

.continuous-4::before {
  content: "";
  position: absolute;
  margin: 2px;
  width: 14px;
  top: 0;
  bottom: 0;
  left: -20px;
  border-radius: inherit;
  background: currentColor;
  box-shadow: -10px 0 12px 3px currentColor;
  clip-path: polygon(0 5%, 100% 0,100% 100%,0 95%,-30px 50%);
  animation: ct4 1s infinite linear;
}

@keyframes ct4 {
  100% {left: calc(100% + 20px)}
}

/**/
body {
  display: grid;
  grid-template-columns: repeat(auto-fit,minmax(250px,1fr));
  grid-auto-rows: 130px;
  place-items:center;
}

* {
  box-sizing: border-box;
}