.el-11,.el-12,.el-13,.el-14,.el-15{color:#000;transition:background-color 10s,color 10s}@keyframes changeColors{to{color:#fff;background-color:#000}}.el-11.change-style,.el-12.change-style,.el-13.change-style,.el-14.change-style,.el-15.change-style{animation:2s 4s forwards changeColors}