its not really clear what you want to do,

something like this ?

1. size(600,600);
2. fill(255,50);
3. colorMode(HSB,4);
4. for(int i = 1; i<=4; i++){
5. fill(i,4,4);
6. arc (width/2, height/2, 200 ,200, i*PI/2,i*PI/2+PI/2);
7. }