Answer by Peter G

'RED' and 'BLUE' are [instance variables][1] (compare to [class/static variables][2]). You need to find the instance to access there values. The easiest way to do that is: var cube = FindObjectOfType( Cube ); cube.RED = true; [1]: http://msdn.microsoft.com/en-us/library/aa691164(v=vs.71).aspx [2]: http://msdn.microsoft.com/en-us/library/aa691162(v=vs.71).aspx