Implement Simon Says module in React

src/App.css

@@ -108,127 +108,6 @@ nav {
     padding: 0.1em 0.5em;
 }
 
-#simonInputs {
-    float: left;
-    margin-right: 5em;
-}
-.collapsed #simonBoard {
-    display: none;
-}
-#simonBoard {
-    display: inline-block;
-    padding-bottom: 40px; /* Compensate for height increase as a result of rotation */
-    position: relative;
-    transform: rotate(45deg);
-}
-#simonBoard > div > div {
-    border: 2px solid black;
-    display: inline-block;
-    height: 64px;
-    width: 64px;
-}
-#simonBoard > .simonRow:first-child > div {
-    border-top-width: 4px;
-}
-#simonBoard > .simonRow:first-child + div > div {
-    border-bottom-width: 4px;
-}
-#simonBoard > .simonRow > div:first-child {
-    border-left-width: 4px;
-}
-#simonBoard > .simonRow > div:last-child {
-    border-right-width: 4px;
-}
-.simonRed {
-    background: radial-gradient(#fb9a9a, #fc7373, red);
-}
-.simonYellow {
-    background: radial-gradient(#fbfb9a, #fcfc73, yellow);
-}
-.simonBlue {
-    background: radial-gradient(#9a9afb, #7373fc, blue);
-}
-.simonGreen {
-    background: radial-gradient(#98c998, #72b772, green);
-}
-
-.arrow {
-    background-color: black;
-    height: 10px;
-    width: 50px;
-    opacity: 0;
-    position: absolute;
-}
-.arrow::after {
-    content: '';
-    border-top: 10px solid transparent;
-    border-left: 20px solid black;
-    border-bottom: 10px solid transparent;
-    height: 0;
-    width: 0;
-    margin-left: 50px;
-    position: absolute;
-    top: -5px;
-}
-#arrowRB {
-    top: 70px;
-    left: 10px;
-    transform: rotate(-90deg);
-}
-#arrowBR {
-    top: 60px;
-    left: 10px;
-    transform: rotate(90deg);
-}
-#arrowBY {
-    top: 30px;
-    left: 45px;
-}
-#arrowYB {
-    top: 30px;
-    left: 45px;
-    transform: rotate(180deg);
-}
-#arrowYG {
-    top: 60px;
-    left: 80px;
-    transform: rotate(90deg);
-}
-#arrowGY {
-    top: 70px;
-    left: 80px;
-    transform: rotate(-90deg);
-}
-#arrowGR {
-    top: 100px;
-    left: 45px;
-    transform: rotate(180deg);
-}
-#arrowRG {
-    top: 100px;
-    left: 45px;
-}
-#arrowRY {
-    top: 66px;
-    left: 44px;
-    transform: rotate(-45deg);
-}
-#arrowYR {
-    top: 66px;
-    left: 44px;
-    transform: rotate(135deg);
-}
-#arrowBG {
-    top: 64px;
-    left: 44px;
-    transform: rotate(45deg);
-}
-#arrowGB {
-    top: 64px;
-    left: 44px;
-    transform: rotate(-135deg);
-}
-
 #sectionWof {
     white-space: nowrap;
 }