                 iterationStart: 0.75,
                  easing: 'steps(2, jump-both)'
                },
    conditions: [
                  { currentTime: 0,    progress: 2/3 },
                  { currentTime: 999,  progress: 2/3 },
                  { currentTime: 1000, progress: 2/3 },
                  { currentTime: 1249, progress: 2/3 },
                  { currentTime: 1250, progress: 1/3 },
                  { currentTime: 1749, progress: 1/3 },
                  { currentTime: 1750, progress: 2/3