At first I thought you only had a few different types (as shown), but then I read you want to use the specific angle for each rectangle, so there could be a lot (360). In that case I think it's probably best to create a method that has as an input parameter the angle, which then draws the rect for you. If you run into performance issues, you can switch to a solution where you prepare-draw 'all' the angles to PImage/PGraphics and just pick the one you need.

Code Example

1. PGraphics pg;
2.  
3. void setup() {
4.   size(500, 500);
5.   pg = createGraphics(300, 300, JAVA2D);
   
6. }
7.  
8. void draw() {
9.   background(255);
10.   float angle = frameCount%360;
11.   drawLines(angle, 20);
12.   image(pg, 100, 100);
13.   fill(0);
14.   text(nf(angle, 3, 0) + " degrees", 10, 20);
15. }
16.  
17. void drawLines(float angle, int num) {
18.   pg.beginDraw();
19.   pg.smooth();
20.   pg.background(0, 0);
21.   pg.rect(0, 0, pg.width-1, pg.height-1);
22.   pg.translate(pg.width/2, pg.height/2);
23.   pg.rotate(radians(angle));
24.   float w = pg.width*1.5/num;
25.   for (int i=0; i<num; i++) {
26.     float x = (i-num/2)*w;
27.     pg.line(x, -pg.height, x, pg.height);
28.   }
29.   pg.endDraw();
30. }