transition('* => active', [
  animate('2s', keyframes([
    style({ backgroundColor: 'blue', offset: 0}),
    style({ backgroundColor: 'red', offset: 0.8}),
    style({ backgroundColor: 'orange', offset: 1.0})
  ])),
]),
transition('* => inactive', [
  animate('2s', keyframes([
    style({ backgroundColor: 'orange', offset: 0}),
    style({ backgroundColor: 'red', offset: 0.2}),
    style({ backgroundColor: 'blue', offset: 1.0})
  ]))
]),