.password-strength-bar {
    position: relative;
    display: block;
    width: 100%;
    height: 4px;
    width: 0;
    border: 1px;
    transition: all .4s;
    -webkit-transition: all .4s;
    -moz-transition: all .4s
}

.password-strength-0 {
    width: 20% !important;
    background-color: #f44336
}

.password-strength-1 {
    width: 40% !important;
    background-color: #ff9800
}

.password-strength-2 {
    width: 60% !important;
    background-color: #ffeb3b
}

.password-strength-3 {
    width: 80% !important;
    background-color: #cddc39
}

.password-strength-4 {
    width: 100% !important;
    background-color: #4caf50
}