Goal: Open the Pocketbook reader app , change the theme color to Emerald Gree
Step instructions:
Open the Pocketbook reader app
Get back to the previous page of the App
Go to the Settings section
Click on the Color theme option
Choose Emerald Green 
Actions:
action_type: open_app
app_name: PocketBook
action_type: navigate_back
action_type: click
action_type: click
action_type: click