How do I make a chair that can spin around like real gaming chairs?

How do I make a chair that can spin around like real gaming chairs? basically I want the script to check if the player sit on the chair, else the script won't run and if the player sit on the chair, they can only use a and d. a to spin the chair to the left and d to spin the chair to the right. Hope this can make you understand. Have a great day!