Example of sequence circuit for pneumatic cylinder using control valves

Hi, I'n new here in posting, but I have read some usefull information.
And now I need your help to find already compleated circuit or help to me to draw one.
Task is to draw circuit with 2 cylinders which acts in sequence and in loop. I hope I could explain it crearly.

For example: I have 2 cylinders (A, B).
Step 1 - A turns
Step 2 - When A is fully moved out turns on B
Step 3 - When B is fully moved out A turns off
Step 4 - When A is fully of turns off B too.