text: from datetime import datetime, timedelta
  from airflow import DAG
  from airflow.operators.dummy_operator import DummyOperator
  from airflow.utils import dates
  from airflow.operators import MyFirstOperator
  
  default_args = {
      "owner": "airflow",
      "depends_on_past": False,
      "start_date": dates.days_ago(1),
  }
  
  dag = DAG('Parent_dag', default_args=default_args, schedule_interval=None)
  
  leave_work = MyFirstOperator(
  	my_operator_param='leave_work...',
      task_id='leave_work', 
      dag=dag,
  )
  cook_dinner = MyFirstOperator(
  	my_operator_param='cook_dinner!!!',
      task_id='cook_dinner',
      dag=dag,
  )
  
  leave_work >> cook_dinner