:root {
    --progressbar-bg: lightgrey;
    --start: red;
    --middle: blue;
    --finish: green;
}

body {
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background-image: url("https://cdn.pixabay.com/photo/2018/12/19/22/00/christmas-3884891_1280.jpg");
    background-size: cover;
    background-position: center;
    font-family: 'Mountains of Christmas'; 
}

h1 {
    font-size: 50px;
    color: white;
    text-shadow: 2px 2px 2px black, -2px -2px 2px red;
}

.container {
    border: 5px solid black;
    border-radius: 25px;
    box-shadow: 3px 3px 3px rgba(0,0,0,0.5);
    width: 300px;
    margin: 50px auto;
}

.progress-bar {
    width: 100%;
    height: 30px;
    background: repeating-linear-gradient(
        45deg,
        white,
        white 10px,
        red 10px,
        red 20px
    );
    border-radius: 15px;
    overflow: hidden;
}

.progress-status {
    height: 100%;
    width: 0;
    background: var(--start);
    animation: progress 3s infinite;
}

@keyframes progress {
    0% {
        width: 0;
        background: var(--start);
    }
    50% {
        width: 50%;
        background: var(--middle);
    }
    100% {
        width: 100%;
        background: var(--finish);
    }
}