How to make an object do a multiple tasks forever

Use My script

NOTE: Remember to fill in the required values in the inspector

There are clear tooltips that describes what you have to Add

 //JS Javascript
 
 #pragma strict
     
     public enum AxisE{
         x,
         y,
         z
     }
     public enum RotationE{
         Right,
         Left
     } 
     @Header("INPUT-REQUIRED")
     @Tooltip("The axis the rotation should be in")
     public var Axis:AxisE;
     @Range(0,90)
     @Tooltip("The Speed the object should move in")
     public var RotationSpeed : float;
     @Tooltip("The Object that will rotaate")
     public var RotationObject : Transform;
     @Tooltip("Maximum Right value the Rotation Object can turn to in degrees")
     @Range(0,360)
     public var MaxRight : float;
     @Tooltip("Maximum Left value the Rotation Object can turn to in degrees")
     @Range(0,360)
     public var MaxLeft : float;
     @Header("SCRIPT DATA-DO NOT EDIT")
     public var CurrentRotation : Vector3;
     public var IsRotating : boolean;
     public var Rotation : RotationE;
     
     function FixedUpdate(){
         CheckSetRotations();
     }
     function CheckSetRotations(){
         CurrentRotation = RotationObject.eulerAngles;
         if(Axis == AxisE.z){
             RotateZ();
             if(CurrentRotation.z > MaxRight){
                 Rotation = RotationE.Left;
             }
             if(-CurrentRotation.z > MaxLeft){
                 Rotation = RotationE.Right;
             }
         }
         if(Axis == AxisE.y){
             RotateY();
             if(CurrentRotation.y > MaxRight){
                 Rotation = RotationE.Left;
             }
             if(-CurrentRotation.y > MaxLeft){
                 Rotation = RotationE.Right;
             }
         }
         if(Axis == AxisE.x){
             RotateX();
             if(CurrentRotation.x > MaxRight){
                 Rotation = RotationE.Left;
             }
             if(-CurrentRotation.x > MaxLeft){
                 Rotation = RotationE.Right;
             }
         }
     }
     function RotateZ(){
         IsRotating = true;
             if(Rotation == RotationE.Right){
                 RotationObject.Rotate(0,0,RotationSpeed);
             }
             if(Rotation == RotationE.Left){
                 RotationObject.Rotate(0,0,-RotationSpeed);
             }
         IsRotating = false;
     }
     function RotateY(){
         IsRotating = true;
             if(Rotation == RotationE.Right){
                 RotationObject.Rotate(0,RotationSpeed,0);
             }
             if(Rotation == RotationE.Left){
                 RotationObject.Rotate(0,-RotationSpeed,0);
             }
         IsRotating = false;
     }
     function RotateX(){
         IsRotating = true;
             if(Rotation == RotationE.Right){
                 RotationObject.Rotate(-RotationSpeed,0,0);
             }
             if(Rotation == RotationE.Left){
                 RotationObject.Rotate(-RotationSpeed,0,0);
             }
         IsRotating = false;
     }

@OsmiousH @Yash @ShadowNukePie