应用: 抖音
任务: 启动抖音，观看首页顶部的视频，留下评论‘真好！’
操作步骤:
step_id: 0
action: CLICK
step_id: 1
action: CLICK
step_id: 2
action: CLICK
step_id: 3
action: TYPE
type_text: 真好！
step_id: 4
action: CLICK
step_id: 5
action: STOP