Definitions

So DrRackert let's me make definitions in the top window, but then it calls these constants, like if I do a simple

(define a 10)

If I try to re-define or set! a 15 then the interpret gets angry and says that a is a constant

How do I define something that can change values?

>>7
lol what?

If you meant changes I made, I just put (define height2 300) (define width2 300) after the first opengl definition, replace the 200s with their appropriate replacement, run the program, and try and redefine one of em.

The exact error is:

define-values: cannot re-define a constant: width2