Hello wise People,

I just started a very little project to learn something about processing. But i'm a bloody beginner, therefore
I don't quite understand the error-message :

 Cannot make a static reference to the non-static method doit(String) from the type Project.Spellcast

I just copied a small part out of my "sourcecode", but it should be enough for you guys to see what isn't working.

1. String usedspell = "boom";
2. void mouseClicked()
3. {
4.   Spellcast.doit(usedspell);
5. }

1. class Spellcast
2. {
3.  ArrayList spells;  
4.  
5.  Spellcast(String usedspell)
6. {
7. if (usedspell == "boom")
8. {
   
9. println(usedspell);
10. }
    
11. }
12. 
    
13. void doit(String usedspell)
14. {
15.  spells = new ArrayList();
16.  spells.add(new Spellcast(usedspell));
17.  drawspell();
18. }
19. 
    
20.  void drawspell()
21.  {
22.   for(int i=0 ; i < spells.size() ; i++)
23.  {
24.   println("Works !");
25.  }
26.  }
27. 
    
28. }

Hope you can help me ( I'm pretty sure you can actually )
Greetings
Kraabumm