Goal:  in the clock app set a 20-minute timer.  
Steps:
action: action_type: click
step_instruction: click on the timer tab at the bottom of screen
action: action_type: click
step_instruction: set a 20 minutes timer
action: action_type: click
step_instruction: set a 20 minutes timer
action: action_type: click
step_instruction: set a 20 minutes timer
action: action_type: click
step_instruction: set a 20 minutes timer
action: action_type: click
step_instruction: click on the start button