substep 0 + 1s

fade after 1s step: should fade in after 1s

substep 0 + 1500ms

fade after 500ms prev: should fade in after another 500ms
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substep 1 + 0s

fade: should fade in after next action

substep 1 + 1s

fade after 1s: should fade in after 1s
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substep 2 + 0s

fade after prev: should fade in after another next action
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substep 1 + 700ms

fade after 700 #item3: should fade in after #item3

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substep 1 + 1s

fade after 1s #item2: should fade in after 1s

substep 1 + 0s

fade after step: should fade in after next action

substep 1 + 1s

fade after 1s: should fade in after 1s

Step without animation.

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