[class~=cursor] {
    display: inline-block;
}

[class~=cursor] {
    width: 10px;
}

<style>body {
    background-color: black;
}

<style>body {
    color: lime;
}

[class~=cursor] {
    height: 20px;
}

<style>body {
    font-family: "Courier New", Courier, monospace;
}

<style>body {
    font-size: 1pc;
}

[class~=cursor] {
    background-color: lime;
}

[class~=cursor] {
    animation: blink 1s infinite;
}

<style>body {
    overflow: hidden;
}

@keyframes blink {
    0% {
        opacity: 1;
    }
    50% {
        opacity: 0;
    }
    100% {
        opacity: 1;
    }
}