   7.14% { background-color: #7e7e7e; }
    14.29% { background-color: #757575; }
    21.43% { background-color: #6b6b6b; }
    28.57% { background-color: #616161; }
    35.71% { background-color: #575757; }
    42.86% { background-color: #4e4e4e; }
    50.0% { background-color: #444444; }
    57.14% { background-color: #3a3a3a; }
    64.29% { background-color: #313131; }
    71.43% { background-color: #272727; }
    78.57% { background-color: #1d1d1d; }
    85.71% { background-color: #131313; }
    92.86% 