body{margin:0;padding:0;background:linear-gradient(135deg,#c00,#4a00e0,#c00);background-size:200% 200%;animation:flow 15s linear infinite;background-attachment:fixed;overflow:hidden;height:100vh;width:100vw;font-family:Arial,sans-serif}@keyframes flow{0%{background-position:0% 0%}to{background-position:100% 100%}}#app{display:flex;justify-content:center;align-items:center;height:100vh;width:100vw}canvas{display:block;box-shadow:0 0 40px #0009}*{-webkit-user-select:none;user-select:none}