Stuck in a while loop, want to revert back to previous menu.

Hi Matlab Community, if you see in my code below I would like to display an error message if the incorrect option is chosen in my menu. I would also like it to revert to the choices again after displaying said error message. as it stands everytime I run the script and the error message displays it get stuck in a loop.

I am very new to matlab, so any help is greatly appreciated.

    choice  =  menu('Where are you travelling from?','Mercury','Earth','Jupiter');
    if choice == 1;                                                            
    choice = menu('Where are you travelling to?','Mercury','Earth','Jupiter');
    while choice==1
        disp('ERROR - You have chosen this planet as your start point, please choose a destination that is different from your start point');

    end;

[Thomas Brown]

Solved it.

    while choice==1
        display('ERROR - You have chosen this planet as your start point, please choose a destination that is different from your start point.');
        choice = menu('Where are you travelling to?','Mercury','Earth','Jupiter');
    end;