@keyframes blue{0%{opacity:0}15%{opacity:1}90%{opacity:1}to{opacity:0}}@keyframes emerald{0%{opacity:0}20%{opacity:0}35%{opacity:1}90%{opacity:1}to{opacity:0}}@keyframes green{0%{opacity:0}40%{opacity:0}55%{opacity:1}90%{opacity:1}to{opacity:0}}@keyframes gray{0%{opacity:0}60%{opacity:0}75%{opacity:1}90%{opacity:1}to{opacity:0}}.blue{animation:1s linear infinite blue}.emerald{animation:1s linear infinite emerald}.green{animation:1s linear infinite green}.gray{animation:1s linear infinite gray}