how can i stop burning my brain?

In my game, my attempts to get an event in order to upgrade an item from level 1 to 10 for example .. but this will happen from another object .. ONE EXAMBLE - I have a subject where A self spawn many B items. when you select one of these objects (B) was the subject will be able to upgrade from the object C, but if the currently selected object and reselect the subject C. then will go level 3 and so on .the upgrades will be to go to animation 2.for each level the cost of upgrades will be 500 gold.

I guess the burning in your brain might stop if you explain yourself a bit clearer..

It's hard to understand the question for me, so I guess if you have trouble explaining it to us, the computer will never understand..

From what I understand you want to select an object B and only be able to select it once..

I guess you could add a boolean variable to object B, add a condition to check if the boolean false on click, set it to true and have your other actions..

follow this tutorial

may be it can help you

scirra.com/tutorials/311/level-select