Thanks

1. void setup () {
2.   size ( 800, 800 );
3.   smooth ();
4.   background ( 124, 0, 162 );
5.   stroke (0, 80);
6. }
7. 
   
8. void draw () {
9.   
10.     noFill ();
11.     fill ( 200, 0, 0, 50 );
12.     ellipse ( mouseX, mouseY, 100, 100 );
13.     
14.     noFill ();
15.     fill ( 0, 200, 0, 50 );
16.     ellipse ( mouseX, mouseY, 100, 100 );
17.     
18.     noFill ();
19.     fill ( 0, 0, 200, 50 );
20.     ellipse ( mouseX, mouseY, 100, 100 );
21.     }

This is my first try, and what I tried to do was to plot a red, and then a green, and then a blue circle, in this order, one after another, in loop. What I get is a greyish circle, always in the same color. Why?

Thanks