Si queremos dar un toque añejo a nuestros juegos o web realizada en HTML, podremos hacerlo de una forma muy sencilla. En la hoja de estilo, o dentro de la etiqueta Style de HTML, deberemos añadir el siguiente código CSS:
/* CRT */
@keyframes flicker{0%{opacity:0.27861;}5%{opacity:0.34769;}10%{opacity: 0.23604;}15%{opacity:0.90626;}20%{opacity:0.18128;}25%{opacity:0.83891;}30%{opacity:0.65583;}35%{opacity:0.67807;}40%{opacity:0.26559;}45%{opacity:0.84693;}50%{opacity:0.96019;}55%{opacity:0.08594;}60%{opacity:0.20313;}65%{opacity:0.71988;}70%{opacity:0.53455;}75%{opacity:0.37288;}80%{opacity:0.71428;}85%{opacity:0.70419;}90%{opacity:0.7003;}95%{opacity:0.36108;}100%{opacity:0.24387;}} @keyframes textShadow{0%{text-shadow: 0.4389924193300864px 0 1px rgba(0,30,255,0.5), -0.4389924193300864px 0 1px rgba(255,0,80,0.3), 0 0 3px;}5%{text-shadow: 2.7928974010788217px 0 1px rgba(0,30,255,0.5), -2.7928974010788217px 0 1px rgba(255,0,80,0.3), 0 0 3px;}10%{text-shadow: 0.02956275843481219px 0 1px rgba(0,30,255,0.5), -0.02956275843481219px 0 1px rgba(255,0,80,0.3), 0 0 3px;}15%{text-shadow: 0.40218538552878136px 0 1px rgba(0,30,255,0.5), -0.40218538552878136px 0 1px rgba(255,0,80,0.3), 0 0 3px;}20%{text-shadow: 3.4794037899852017px 0 1px rgba(0,30,255,0.5), -3.4794037899852017px 0 1px rgba(255,0,80,0.3), 0 0 3px;}25%{text-shadow: 1.6125630401149584px 0 1px rgba(0,30,255,0.5), -1.6125630401149584px 0 1px rgba(255,0,80,0.3), 0 0 3px;}30%{text-shadow: 0.7015590085143956px 0 1px rgba(0,30,255,0.5), -0.7015590085143956px 0 1px rgba(255,0,80,0.3), 0 0 3px;}35%{text-shadow: 3.896914047650351px 0 1px rgba(0,30,255,0.5), -3.896914047650351px 0 1px rgba(255,0,80,0.3), 0 0 3px;}40%{text-shadow: 3.870905614848819px 0 1px rgba(0,30,255,0.5), -3.870905614848819px 0 1px rgba(255,0,80,0.3), 0 0 3px;}45%{text-shadow: 2.231056963361899px 0 1px rgba(0,30,255,0.5), -2.231056963361899px 0 1px rgba(255,0,80,0.3), 0 0 3px;}50%{text-shadow: 0.08084290417898504px 0 1px rgba(0,30,255,0.5), -0.08084290417898504px 0 1px rgba(255,0,80,0.3), 0 0 3px;}55%{text-shadow: 2.3758461067427543px 0 1px rgba(0,30,255,0.5), -2.3758461067427543px 0 1px rgba(255,0,80,0.3), 0 0 3px;}60%{text-shadow: 2.202193051050636px 0 1px rgba(0,30,255,0.5), -2.202193051050636px 0 1px rgba(255,0,80,0.3), 0 0 3px;}65%{text-shadow: 2.8638780614874975px 0 1px rgba(0,30,255,0.5), -2.8638780614874975px 0 1px rgba(255,0,80,0.3), 0 0 3px;}70%{text-shadow: 0.48874025155497314px 0 1px rgba(0,30,255,0.5), -0.48874025155497314px 0 1px rgba(255,0,80,0.3), 0 0 3px;}75%{text-shadow: 1.8948491305757957px 0 1px rgba(0,30,255,0.5), -1.8948491305757957px 0 1px rgba(255,0,80,0.3), 0 0 3px;}80%{text-shadow: 0.0833037308038857px 0 1px rgba(0,30,255,0.5), -0.0833037308038857px 0 1px rgba(255,0,80,0.3), 0 0 3px;}85%{text-shadow: 0.09769827255241735px 0 1px rgba(0,30,255,0.5), -0.09769827255241735px 0 1px rgba(255,0,80,0.3), 0 0 3px;}90%{text-shadow: 3.443339761481782px 0 1px rgba(0,30,255,0.5), -3.443339761481782px 0 1px rgba(255,0,80,0.3), 0 0 3px;}95%{text-shadow: 2.1841838852799786px 0 1px rgba(0,30,255,0.5), -2.1841838852799786px 0 1px rgba(255,0,80,0.3), 0 0 3px;}100%{text-shadow: 2.6208764473832513px 0 1px rgba(0,30,255,0.5), -2.6208764473832513px 0 1px rgba(255,0,80,0.3), 0 0 3px;}} .crt::after{content:" ";display:block;position:absolute;top:0;left:0;bottom:0;right:0;background:rgba(18, 16, 16, 0.1);opacity:0;z-index:2;pointer-events:none;animation:flicker 0.15s infinite;} .crt::before{content:" ";display:block;position:absolute;top:0;left:0;bottom:0;right:0;background:linear-gradient(rgba(18, 16, 16, 0) 50%, rgba(0, 0, 0, 0.25) 50%),linear-gradient(90deg, rgba(255, 0, 0, 0.06), rgba(0, 255, 0, 0.02), rgba(0, 0, 255, 0.06));z-index:2;background-size:100% 2px, 3px 100%;pointer-events:none;} .crt{animation:textShadow 1.6s infinite;}
En el archivo HTML, dentro de la etiqueta body o de un div que englobe la estructura del juego, habrá que llamar a la clase de la siguiente forma:
<div class="crt"> o <body class="crt">
Según la etiqueta que usemos.
Para aprovecharlo en nuestros juegos realizados con Twine 2, tendremos que añadir el código CSS al estilo de nuestro juego, y dentro de todos los pasajes, incluir el texto dentro de la siguiente estructura:
<div class="crt"> Texto del pasaje </div>
