.circle {
   width: 50px;
   height: 50px;
   border-radius: 50%;
   display: inline-block;
   margin-right: 20px;
}

.traffic-light-red-red {
   background-color: #a02128;
}

.traffic-light-red-amber {
   background-color: gray;
}

.traffic-light-red-green {
   background-color: gray;
}

.traffic-light-amber-red {
   background-color: gray;
}

.traffic-light-amber-amber {
   background-color: #F7BA0B;
}

.traffic-light-amber-green {
   background-color: gray;
}

.traffic-light-green-red {
   background-color: gray;
}

.traffic-light-green-amber {
   background-color: gray;
}

.traffic-light-green-green {
   background-color: #317f43;
}