timing_test(function() {
  at( 0.0, function() {assert_styles('#a', {'left':'0px'})}, "Autogenerated test at t= 0.0");
  at( 1.0, function() {assert_styles('#a', {'left':'50px'})}, "Autogenerated test at t= 1.0");
  at( 2.0, function() {assert_styles('#a', {'left':'100px'})}, "Autogenerated test at t= 2.0");
  at( 3.0, function() {assert_styles('#a', {'left':'150px'})}, "Autogenerated test at t= 3.0");
  at( 4.0, function() {assert_styles('#a', {'left':'200px'})}, "Autogenerated test at t= 4.0");
  at( 5.0, function() {assert_styles('#a', {'left':'250px'})}, "Autogenerated test at t= 5.0");
  at( 6.0, function() {assert_styles('#a', {'left':'300px'})}, "Autogenerated test at t= 6.0");
  at( 7.0, function() {assert_styles('#a', {'left':'350px'})}, "Autogenerated test at t= 7.0");
  at( 8.0, function() {assert_styles('#a', {'left':'400px'})}, "Autogenerated test at t= 8.0");
  at( 9.0, function() {assert_styles('#a', {'left':'450px'})}, "Autogenerated test at t= 9.0");
  at(10.0, function() {assert_styles('#a', {'left':'500px'})}, "Autogenerated");
  at(11.0, function() {assert_styles('#a', {'left':'450px'})}, "Autogenerated");
  at(12.0, function() {assert_styles('#a', {'left':'400px'})}, "Autogenerated");
  at(13.0, function() {assert_styles('#a', {'left':'350px'})}, "Autogenerated");
  at(14.0, function() {assert_styles('#a', {'left':'300px'})}, "Autogenerated");
  at(15.0, function() {assert_styles('#a', {'left':'250px'})}, "Autogenerated");
  at(16.0, function() {assert_styles('#a', {'left':'200px'})}, "Autogenerated");
  at(17.0, function() {assert_styles('#a', {'left':'150px'})}, "Autogenerated");
  at(18.0, function() {assert_styles('#a', {'left':'100px'})}, "Autogenerated");
  at(19.0, function() {assert_styles('#a', {'left':'50px'})}, "Autogenerated");
  at(20.0, function() {assert_styles('#a', {'left':'0px'})}, "Autogenerated");
}, "Autogenerated checks.");
