Goal: I'd like to participate in the course challenge to practice and test my knowledg
Step instructions:
scroll down 
scroll down 
scroll down 
scroll down 
scroll down 
scroll down 
scroll down 
click on Take Course Challenge button
click on Let's go button
Actions:
action_type: scroll
direction: down
action_type: scroll
direction: down
action_type: scroll
direction: down
action_type: scroll
direction: down
action_type: scroll
direction: down
action_type: scroll
direction: down
action_type: scroll
direction: down
action_type: click
action_type: click