-webkit-transform: perspective(400px) rotate3d(1, 0, 0, 90deg);\n    transform: perspective(400px) rotate3d(1, 0, 0, 90deg);\n    transition-timing-function: ease-in;\n    opacity: 0;\n  }\n  40% {\n    -webkit-transform: perspective(400px) rotate3d(1, 0, 0, -20deg);\n    transform: perspective(400px) rotate3d(1, 0, 0, -20deg);\n    transition-timing-function: ease-in;\n  }\n  60% {\n    -webkit-transform: perspective(400px) rotate3d(1, 0, 0, 10deg);\n    transform: perspective(400px) rotate3d(1, 0, 0,...

facility refers to a function or data to be supplied by an Application
that uses the facility (other than as an argument passed when the
facility is invoked), then you may convey a copy of the modified
version:

   a) under this License, provided that you make a good faith effort to
   ensure that, in the event an Application does not supply the
   function or data, the facility still operates, and performs