change property an object when another change

If you want the property to be synced across all GameObjects which has your MonoBehavior class attached, then you could give the class a static field and just have the property reference that field.

thank you, but I don't want the property to be synced across all GameObjects, I explain more

 class  Columns
 {
     var affectedColumnLenth:int;
     var selectedColumn:GameObject;
     
     public var columnCurentSituation:int;//-1 =down , 1=top
     function get ColumnCurentSituation():int
     {
         return columnCurentSituation;
     }
     function set ColumnCurentSituation(value:int)
     {
         columnCurentSituation=value;
     }
 
     function up()
     {
         columnCurentSituation=1;
         print("UP");
     }
     
     function down()
     {
         columnCurentSituation=-1;
         print("Down");
     }
     
     function ColumnUpAndDown(columnCurentSituation,affectedColumns)
     {
     
         if(columnCurentSituation==-1)
         {
             up();
         }
         if(columnCurentSituation==1)
         {
             down();
         }
 
     }
 }
 
 var column:Columns;
 var affectedColumns:Columns[];
 
 function OnMouseDown()
 {
     column.ColumnUpAndDown(column.columnCurentSituation,column.affectedColumns);
     
     for(var i:int=0;i<column.affectedColumnLenth;i++)
     {
         if(affectedColumns[i].columnCurentSituation==1)
         {
             //
         }
         if(affectedColumns[i].columnCurentSituation==-1)
         {
             //
         }
         
         affectedColumns[i].columnCurentSituation=-column.columnCurentSituation;
         print(affectedColumns[i].selectedColumn.name.ToString());
     }
 
 }
 

for example attach this code to tow object "A" and "B" in below code "columnCurentSituation" change only "A" when I click on "A", I want columnCurentSituation change in "B" too.

 affectedColumns[i].columnCurentSituation=-column.columnCurentSituation;

any help?