Transfering script to other game objects via code (Unity 2D)

Hey Everyone, is there a way to transfer a script to another object via code? For example, lets say there is a cube (I will address the cube as player) that has a player controller script on it and there is a circle right next to the player. I want to input a key (any key that is specified in the script) that will allow me to disable the cube's player controller script and place it in the circle. This should allow me to controller now the circle.