Arduino UNO programming

A sketch and a sketch are needed for the following task:
The servo drive (MG955) must rotate 90 degrees at a certain time (real time is set by buttons), and return to its original position after a specified period of time (time is programmed by buttons). It is possible to program 5 cycles.
Example of five cycles: at 8:00 the servo drive will make a turn of 90 degrees ... It's been 10 seconds. The servo is back to its original position (end of the first cycle). At 10:00 the servo drive will make a turn of 90 degrees. It's been 22 seconds. The servo is back in its original position (end of the second cycle). At 10:30, the servo will turn 90 degrees. It's been 2 seconds. The servo is back to its original position (end of the third cycle). At 15:00 the servo drive will make a turn of 90 degrees. It's been 43 seconds. The servo drive returned to its original position (end of the fourth cycle). At 20:00 the servo drive will make a turn of 90 degrees. It was 54 seconds... The servo is back in its original position (end of the fifth cycle).