A problem about changing the variable value when I click on my object

Hi. When I click on my object, I change the variable values of my object. Variable value is determined random. But every time I click these values change again. I just want it to change and save the first time I click. How can I do it?

Use another variable (2) on the object to determine if it has been clicked, set it to true when you click it and change the other variable (1), otherwise it is set to false when not clicked. Then on the event for changing variable 1 you say only if variable 2 = false.