Hi,
There is no default options in HikaShop to do that.
The price is automatically changed when selecting an option, but all the options are displayed at a time.
To display only one option, then the second one when the first is selected, then the next one, etc.
It will require custom code, adding css to set as display : none the options, and some javascript to change this display:none to display:inherit, when the previous option is value is selected, using the onchange javasscript function.
A good php / javascript level is required.