How to make helicopter blades run continuously

I am doing an assignment with four helicopters. They are supposed to raise one at a time with the propellers turning. After each is raised, the propellers should turn continuously. I can only make them turn continuously together and not as the assignment states. The specific assignment is:


Create a world with a list containing four helicopters. One at a time, each helicopter should have its propeller turn, and rise to the same height......Once started, each helicopter's propeller should turn throughout the story.

I know how to make a list, but again, I can only figure out how to start all propellers together. HELP PLEASE!

I am not asking for anyone to do an assignment. I am just trying to figure out how to only begin the propellers of each helicopter to begin turning right before the copter goes up, and continue to turn throughout the remainder of the scenes.

[x2495iiii]

Use do together methods and wait commands. Example below.

Thank you very much for your help. It is so easy, I am embarrassed!

[x2495iiii]

Don't worry about it. It's how we learn.

I get that this works and will do, but the class is asking to create a list, and make the propellors spin continuously whiile in the air.