应用: 淘宝
任务: 在淘宝闪购页面中点击超市便利模块，购买一袋500克的大米。
操作步骤:
step_id: 0
action: CLICK
step_id: 1
action: CLICK
step_id: 2
action: CLICK
step_id: 3
action: CLICK
step_id: 4
action: CLICK
step_id: 5
action: TYPE
type_text: 500克大米
step_id: 6
action: CLICK
step_id: 7
action: STOP